CN106015586A - Stepped end face type magnetic fluid sealing device - Google Patents
Stepped end face type magnetic fluid sealing device Download PDFInfo
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- CN106015586A CN106015586A CN201610608981.7A CN201610608981A CN106015586A CN 106015586 A CN106015586 A CN 106015586A CN 201610608981 A CN201610608981 A CN 201610608981A CN 106015586 A CN106015586 A CN 106015586A
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- pole shoe
- annular groove
- pole
- ladder
- magnetic fluid
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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
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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 relates to the field of mechanical engineering sealing, in particular to a stepped end face type magnetic fluid sealing device. The stepped end face type magnetic fluid sealing device comprises a housing, a left pole shoe, a middle pole shoe, a right pole shoe and permanent magnets, wherein the middle pole shoe is installed in the middle of a shaft, and step structures are symmetrically arranged on the left side and the right side of the middle pole shoe in the radial direction. The left pole shoe is installed on the left side of the middle pole shoe, the right pole shoe is installed on the right side of the middle pole shoe, pole teeth I and an annular groove I are arranged on the right end face of the left pole shoe, the pole teeth I correspond to the step side face of the left end of the middle pole shoe, and the annular groove I is formed among the pole teeth I. Pole teeth II and an annular groove II are arranged on the left end face of the right pole shoe, the pole teeth II correspond to the step side face of the right end of the middle pole shoe, and the annular groove II is formed among the pole teeth II. The permanent magnets are installed in the annular groove I and the annular groove II. The sealing device has good sealing properties and can meet the using requirements of working conditions including large gap, high speed, heavy load and the like.
Description
Technical field
The invention belongs to sealing field of mechanical engineering, be specifically related to a kind of notch cuttype end-surface type magnetic fluid seal device.
Background technology
Magnetic fluid seal is pressure, and performance significantly reduces along with the increase of seal clearance.Therefore the pressure performance of raising wide arc gap magnetic fluid seal is one of hot issue of current research.One of method improving the wide arc gap pressure performance of magnetic fluid-tight is by improving magnetic fluid seal structure.Existing magnetic fluid seal device is by arranging labyrinth seal structure, and the sealing property of more traditional sealing structure is greatly improved, but owing to arranging axial seal ring, the circular runout that rotating shaft produces in rotation process is bigger on the impact of sealing property；Further, since seal structure to arrange the defect of existence, causing the leakage rate of magnetic fluid during seal failure big, 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
Present invention seek to address that existing sealing device cannot realize the requirement of high sealing performance under the operating modes such as high speed or wide arc gap, it is provided that a kind of notch cuttype end-surface type magnetic fluid seal device.
Technical scheme is as follows: a kind of notch cuttype end-surface type magnetic fluid seal device, including shell, left 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 right side be the ladder of hierarchic structure, left side and right side respectively along journal axle to setting；Described 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；
It is equal with the step number of the left side of middle pole shoe that pole tooth I and annular groove I, described pole tooth I are set on the right side of described left pole shoe, between adjacent pole tooth I, annular groove I is set；Axially arranged along axle of described pole tooth I, side to each ladder of the left side of middle pole shoe extends respectively, gap is left between right side and the side of each ladder of each pole tooth I, magnetic fluid is injected in the right side of pole tooth I, under the action of a magnetic force, magnetic fluid is adsorbed on the right side of pole tooth, and 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；
It is equal with the step number of the right side of middle pole shoe that pole tooth II and annular groove II, described pole tooth II are set on the left side of described right pole shoe, between adjacent pole tooth II, annular groove II is set；Axially arranged along axle of described pole tooth II, side to each ladder of the right side of middle pole shoe extends respectively, gap is left between left side and the side of each ladder of each pole tooth II, magnetic fluid is injected in the left side of pole tooth II, under the action of a magnetic force, magnetic fluid is adsorbed on the left side of pole tooth II, and 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, and the axial depth of each annular groove I progressively shoals on the direction of shell at axle, and the difference of adjacent two annular groove I axial depth is equal to the axial length of arbitrary ladder of middle pole shoe left end；Described each annular groove II axial depth is different, and the axial depth of each annular groove II progressively shoals on the direction of shell at axle, and the difference of adjacent two annular groove II axial depth is equal to the axial length of arbitrary ladder of middle pole shoe right-hand member.
The left side of described middle pole shoe is mutually corresponding in mirror image with the hierarchic structure of right side, and the axial length of each ladder is equal.
Sealing device of the present invention also includes that jump ring, magnetism-isolating loop, bearing, described jump ring are installed on axle, 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, and interior magnetism-isolating loop is installed on axle, there is gap between inwall and the outer wall of interior magnetism-isolating loop of outer magnetism-isolating loop, and the axial length of outer magnetism-isolating loop and interior magnetism-isolating loop is equal.
Described permanent magnet is radial magnetizing type permanent magnet, the opposite polarity of two adjacent permanent magnets on left pole shoe, the opposite polarity of two adjacent permanent magnets on right pole shoe.
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 distance between the side of ladder be 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 of the present invention is as follows: middle pole shoe is installed on the middle part of axle；Rubber ring is respectively installed in the annular groove III of left pole shoe and right pole shoe outer ring surface, permanent magnet is installed in the annular groove I of left pole shoe, make the permanent magnet polarity in each annular groove I contrary, permanent magnet is installed in the annular groove II of right pole shoe, makes the permanent magnet polarity in annular groove II contrary；Magnetic fluid is injected separately into pole tooth I and the end face of pole tooth II；In the left side of middle pole shoe, jump ring, left pole shoe, magnetism-isolating loop, bearing are installed successively, on the right side of middle pole shoe, jump ring, right pole shoe, magnetism-isolating loop, bearing are installed successively；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 the bearing in left side, and 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 of the present invention, the two ends, left and right of middle pole shoe are symmetrical arranged hierarchic structure radially, left pole shoe with right pole shoe arrange the pole tooth corresponding with the ladder on middle pole shoe, annular groove between the tooth of pole is in hierarchic structure, make middle pole shoe form notch cuttype radially with left pole shoe and right pole shoe and seal structure, notch cuttype seals structure and has good poly-magnetic property, thus enhance the voltage endurance capability sealing structure, the loss of magnetic fluid when reducing seal failure；Additionally, notch cuttype radially seals structure makes seal clearance not affected by rotating shaft circular runout, in the left and right sides of middle pole shoe, jump ring is set, coordinate shell and end cap effect realize sealing the axial location of structure, advantageously ensure that the fluctuation of seal clearance in the range of reliably, the sealing property making sealing device is reliable and stable；Due to reasonable in design, sealing device of the present invention is in the rotating machinery requiring the special operation conditions such as wide arc gap, and its voltage endurance capability meets requirement, thus expands range of safety operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of sealing device of the present invention
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-, the outer magnetism-isolating loop of 5-, 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 invention will be further described 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, middle pole shoe 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 are ladder being radially arranged along axle 1 respectively of hierarchic structure, left side and right side；Described left pole shoe 6 is 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；
It is equal with the step number of the left side of middle pole shoe 8 that pole tooth I61 and annular groove I62, described pole tooth I61 are set on the right side of described left pole shoe 6, between adjacent pole tooth I61, annular groove I62 is set；Axially arranged along axle 1 of described pole tooth I61, side to each ladder of the left side of middle pole shoe 8 extends respectively, leave gap between right side and the side of each ladder of each pole tooth I61, described pole tooth I61 at axle 1 height radially less than the height of the side of the ladder of its correspondence；Described annular groove I62 arranges permanent magnet 7；
It is equal with the step number of the right side of middle pole shoe 8 that pole tooth II91 and annular groove II92, described pole tooth II91 are set on the left side of described right pole shoe 9, between adjacent pole tooth II91, annular groove II92 is set；Axially arranged along axle 1 of described pole tooth II91, side to each ladder of the right side of middle pole shoe 8 extends respectively, leave gap between left side and the side of each ladder of each pole tooth II91, described pole tooth II91 at axle 1 height radially less than the height of the side of the ladder of its correspondence；Described annular groove II92 arranges permanent magnet 7.
Described each annular groove I62 axial depth is different, the axial depth of each annular groove I62 progressively shoals on the direction of shell 2 at axle 1, and the difference of adjacent two annular groove I62 axial depth is equal to the axial length of arbitrary ladder of middle pole shoe 8 left end；Described each annular groove II92 axial depth is different, the axial depth of each annular groove II92 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 the axial length of arbitrary ladder of middle pole shoe 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 the axial length of each ladder is equal.
Sealing device of the present invention also includes that jump ring 10, magnetism-isolating loop, bearing 3, described jump ring 10 are installed on axle 1, is positioned at the left and right sides of middle pole shoe 8；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.
Described magnetism-isolating loop includes outer magnetism-isolating loop 5 and interior magnetism-isolating loop 4, outer magnetism-isolating loop 5 is installed on the inwall of shell 2, interior magnetism-isolating loop 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, and the axial length of outer magnetism-isolating loop 5 and interior magnetism-isolating loop 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, the opposite polarity of two adjacent permanent magnets 7 on right 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.
On described left pole shoe 6 on pole tooth I61 and right pole shoe 9 pole tooth II91 end face and on middle pole shoe 8 distance between the side of ladder be 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 of the present invention is as follows: middle pole shoe 8 is installed on the middle part of axle 1；Rubber ring is respectively installed in the annular groove III12 of left pole shoe 6 and right pole shoe 9 outer ring surface, permanent magnet 7 is installed in the annular groove I62 of left pole shoe 6, make permanent magnet 7 opposite polarity in each annular groove I62, permanent magnet 7 is installed in the annular groove II92 of right pole shoe 9, makes permanent magnet 7 opposite polarity in annular groove II92；Magnetic fluid is injected separately into pole tooth I61 and the end face of pole tooth 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, on the right side of middle pole shoe 8, jump ring 10, right pole shoe 9, magnetism-isolating loop, bearing 3 are installed successively；Installing shell 2 on axle 1, make shell 2 cover the above-mentioned part being installed 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 positioned at the outer ring of bearing 3 on right side by the compression of threadeding with shell 2 right-hand member.
Claims (10)
1. a notch cuttype end-surface type magnetic fluid seal device, including shell (2), left pole shoe (6), permanent magnet (7), middle pole shoe (8), right pole shoe (9), it is characterized in that: 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 are ladder being radially arranged along axle (1) respectively of hierarchic structure, left side and right side；Described left pole shoe (6) is 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) the pole tooth I(61 equal, adjacent with the step number of the left side of middle pole shoe (8)) between annular groove I(62 is set)；Described pole tooth I(61) axially arranged along axle (1), side to each ladder of the left side of middle pole shoe (8) extends respectively, each pole tooth I(61) right side and the side of each ladder between leave gap, described pole tooth I(61) at axle (1) height radially less than the height of the side of 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), 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) at axle (1) height radially 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 characterized in that: described each annular groove I(62) axial depth difference, each annular groove I(62) axial depth progressively shoal on the direction of shell (2) at axle (1), and adjacent two annular groove I(62) difference of axial depth is equal to the axial length of arbitrary ladder of middle pole shoe (8) left end；Described each annular groove II(92) axial depth difference, each annular groove II(92) axial depth progressively shoal on the direction of shell (2) at axle (1), and adjacent two annular groove II(92) difference of axial depth is equal to the axial length of arbitrary ladder of middle pole shoe (8) 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: the left side of described middle 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 that jump ring (10), described jump ring (10) are installed on axle (1), be 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 including 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 characterized in that: described magnetism-isolating loop includes outer magnetism-isolating loop (5) and interior magnetism-isolating loop (4), outer magnetism-isolating loop (5) is installed on the inwall of shell (2), interior magnetism-isolating loop (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), the axial length of outer magnetism-isolating loop (5) and interior magnetism-isolating loop (4) is equal.
7. notch cuttype end-surface type magnetic fluid seal device as claimed in claim 1, it is characterized in that: described permanent magnet (7) is radial magnetizing type permanent magnet, the opposite polarity of the upper two adjacent permanent magnets (7) of left pole shoe (6), the opposite polarity of the upper two adjacent permanent magnets (7) of right pole shoe (9).
8. notch cuttype end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that: the ladder quantity at described middle pole shoe (8) 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: the upper pole tooth I(61 of described left pole shoe (6)) and the upper pole tooth II(91 of right pole shoe (9)) end face and the side of centre pole shoe (8) above ladder between distance be 0.1-5mm.
10. notch cuttype end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that: on left pole shoe (6) and right pole shoe (9) outer ring surface, it is respectively provided with annular groove III(12), it is used for rubber seal is installed.
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 |
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| 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 |
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| CN106015586A true CN106015586A (en) | 2016-10-12 |
| CN106015586B CN106015586B (en) | 2017-09-29 |
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| 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620799A (en) * | 2017-10-30 | 2018-01-23 | 广西科技大学 | A kind of high vacuum device for sealing magnetic fluid |
| CN107816553A (en) * | 2017-12-13 | 2018-03-20 | 广西科技大学 | A kind of ladder shaft type device for sealing magnetic fluid |
| CN107956882A (en) * | 2017-12-13 | 2018-04-24 | 广西科技大学 | A kind of multistage disk device for sealing magnetic fluid |
| CN108006233A (en) * | 2017-12-14 | 2018-05-08 | 广西科技大学 | A kind of telescopic device for sealing magnetic fluid of trapezoidal pole shoe |
| CN108061163A (en) * | 2017-12-13 | 2018-05-22 | 广西科技大学 | A kind of staged device for sealing magnetic fluid |
| CN111457100A (en) * | 2020-04-24 | 2020-07-28 | 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620799A (en) * | 2017-10-30 | 2018-01-23 | 广西科技大学 | A kind of high vacuum device for sealing magnetic fluid |
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| CN107816553A (en) * | 2017-12-13 | 2018-03-20 | 广西科技大学 | A kind of ladder shaft type device for sealing magnetic fluid |
| CN107956882A (en) * | 2017-12-13 | 2018-04-24 | 广西科技大学 | A kind of multistage disk device for sealing magnetic fluid |
| CN108061163A (en) * | 2017-12-13 | 2018-05-22 | 广西科技大学 | A kind of staged device for sealing magnetic fluid |
| 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 |
| CN107956882B (en) * | 2017-12-13 | 2023-05-05 | 广西科技大学 | Multistage disc magnetic fluid sealing device |
| CN108006233A (en) * | 2017-12-14 | 2018-05-08 | 广西科技大学 | A kind of telescopic device for sealing magnetic fluid of trapezoidal pole shoe |
| CN111457100A (en) * | 2020-04-24 | 2020-07-28 | 中国矿业大学 | Axial and radial combined type magnetic liquid sealing structure |
| 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 |
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