CN106015583A - Symmetrical staggered-tooth type magnetic fluid sealing device - Google Patents
Symmetrical staggered-tooth type magnetic fluid sealing device Download PDFInfo
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- CN106015583A CN106015583A CN201610599731.1A CN201610599731A CN106015583A CN 106015583 A CN106015583 A CN 106015583A CN 201610599731 A CN201610599731 A CN 201610599731A CN 106015583 A CN106015583 A CN 106015583A
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- cannelure
- pole
- pole shoe
- pole tooth
- shoe
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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 invention belongs to the field of mechanical engineering sealing and particularly relates to a symmetrical staggered-tooth type magnetic fluid sealing device. The symmetrical staggered-tooth type magnetic fluid sealing device comprises a middle pole shoe, a left pole shoe, a right pole shoe, permanent magnets and a shell; the middle pole shoe is mounted in the middle of a shaft, the left end face of the middle pole shoe is provided with a plurality of pole teeth I, an annular groove I is formed between every two adjacent pole teeth I, and the annular grooves I are internally provided with the permanent magnets; the right end face of the middle pole shoe is provided with a plurality of pole teeth II, an annular groove II is formed between every two adjacent pole teeth II, and the annular grooves II are internally provided with the permanent magnets; the left side and the right side of the middle pole shoe are provided with the left pole shoe and the right pole shoe respectively, the right end face of the left pole shoe is provided with pole teeth III and annular grooves III, the left end face of the right pole shoe is provided with pole teeth IV and annular grooves IV, the pole teeth I stretch into the annular grooves III, the pole teeth III stretch into the annular grooves I, the pole teeth II stretch into the annular groove IV, and the pole teeth IV stretch into the annular grooves II. The sealing device is high in pressure resistance and stable in sealing performance.
Description
Technical field
The invention belongs to sealing field of mechanical engineering, be specifically related to a kind of symmetric form bayonet-type magnetic fluid seal device.
Background technology
Along with economical growing, sealing property is required more and more higher by the association areas such as industrial equipment, traditional sealing means has been difficult to meet the seal request of some special occasions, the development of magnetic fluid technique has promoted the development of Magneticfluid Seal Technique, and Magneticfluid Seal Technique just plays an increasingly important role in field of sealing technology.Existing sealing structure, its sealing ring is straight ring type, and when seal failure, the leakage rate of magnetic fluid is big, and when being applied under the conditions of wide arc gap, the bearing capacity sealing structure is low, it is difficult to meet the requirement of the special operation conditions such as high-speed overload.The most existing sealing device permanent magnet is longer to the magnetic circuit of seal clearance, and the magnetic field force causing magnetic fluid in seal clearance to be subject to is strong, and when there is seal failure, magnetic fluid loss amount is big.
Summary of the invention
The present invention is directed to the deficiency of present technology, it is provided that the symmetric form bayonet-type magnetic fluid seal device of a kind of good sealing effect.
Technical scheme is as follows:
A kind of symmetric form bayonet-type magnetic fluid seal device, including middle pole shoe, left pole shoe, right pole shoe, permanent magnet, shell；Described middle pole shoe is arranged on the middle part of axle, and the left side of middle pole shoe is offered multiple pole tooth I, offered cannelure I, be provided with permanent magnet, the opposite polarity of the adjacent permanent magnet in two cannelure I in cannelure I between two adjacent pole tooth I；Multiple pole tooth II is offered in the right side of middle pole shoe, offers cannelure II, be provided with permanent magnet, the opposite polarity of the adjacent permanent magnet in two cannelure II in cannelure II between two adjacent pole tooth II；
Described left pole shoe is installed on the axle on the left of middle pole shoe, multiple pole tooth III and cannelure III is offered on the right side of left pole shoe, each cannelure I of pole shoe left side in the middle of pole tooth III one_to_one corresponding respectively, pole tooth III stretches in cannelure I, leaves gap between end and the permanent magnet of pole tooth III；In the middle of cannelure III one_to_one corresponding respectively, each pole tooth I, pole tooth I of pole shoe left side stretch in cannelure III, leave gap between end and the right side of cannelure III of pole tooth I；Injecting sealing medium in cannelure III, sealing medium is adsorbed on the left side of pole tooth I under the action of a magnetic force
Described right pole shoe is installed on the axle on the right side of middle pole shoe, pole tooth IV and cannelure IV is offered on the left side of right pole shoe, each cannelure II of pole shoe right side in the middle of pole tooth IV one_to_one corresponding respectively, pole tooth IV stretches in cannelure II, leaves gap between end and the permanent magnet of pole tooth；In the middle of cannelure IV one_to_one corresponding respectively, each pole tooth II, pole tooth II of pole shoe right side stretch in cannelure IV, leave gap between pole tooth II end and the left side of cannelure IV；Injecting sealing medium in cannelure IV, sealing medium is adsorbed on the right side of pole tooth II under the action of a magnetic force.
Also include that jump ring, described jump ring are arranged on the axle of the middle pole shoe left and right sides, be close to middle pole shoe both sides.
Also include two bearings and two groups of magnetism-isolating loops, two groups of described magnetism-isolating loops are respectively provided on left pole shoe left side and right pole shoe right side, two bearings are installed on axle, are respectively provided at the right side of magnetism-isolating loop on the left side of magnetism-isolating loop on left pole shoe left side and right pole shoe right side.
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 outer magnetism-isolating loop and interior magnetism-isolating loop, and outer magnetism-isolating loop is identical with the axial length of interior magnetism-isolating loop.
Described permanent magnet is radial magnetizing type permanent magnet.
The periphery of left pole shoe is offered groove I, in the periphery of right pole shoe is offered groove II, described groove I and groove II, rubber ring is installed.
The quantity of pole tooth I is 2-8, and its radial height is 0.2-1mm, and the number of cannelure I is 1-7, and the radial height of cannelure I is 2-8mm；Pole tooth II and the quantity of pole tooth I, equivalently-sized, cannelure II and the quantity of cannelure I, equivalently-sized.
The quantity of described pole tooth III is 2-8, and its radial height is 0.2-1mm；The number of cannelure III is 2-8, and its radial height is 2-8mm；Pole tooth IV and the quantity of pole tooth III, equivalently-sized, cannelure IV and the quantity of cannelure III, equivalently-sized.
Gap length between end and the right side of cannelure III of pole tooth I is 0.1-5mm, and the gap length between pole tooth II end and the left side of cannelure IV is 0.1-5mm.
Pole tooth I and pole tooth II is symmetrical relative to middle pole shoe.
The installation process of the present invention is as follows: be separately mounted to by permanent magnet in the middle cannelure I of pole shoe left side and the cannelure II of right side, middle pole shoe is arranged on the middle part of axle, is respectively mounted jump ring on the middle left side of pole shoe and the axle on right side；nullRubber ring is installed in the groove I of left pole shoe periphery，Rubber ring is installed in the groove II of right pole shoe periphery，Sealing medium is injected in the cannelure III of left pole shoe right side，Sealing medium is magnetic fluid，Sealing medium is injected in the cannelure IV of right pole shoe left side，This sealing medium is magnetic fluid，On the axle in the left side that more left pole shoe is arranged on middle pole shoe，On the axle on the right side that right pole shoe is arranged on middle pole shoe，The pole tooth I on the left of middle pole shoe is made to stretch in cannelure III，And contact with the sealing medium in cannelure III，The pole tooth II on the right side of middle pole shoe is made to stretch in cannelure IV，And contact with the sealing medium in cannelure IV，In tooth III in pole stretches into the cannelure I on the left of middle pole shoe simultaneously，And there is gap in the left part of the permanent magnet in the right part of pole tooth III and cannelure I，Pole tooth IV stretches into the cannelure II on the right side of middle pole shoe，And there is gap with the right part of permanent magnet in cannelure II in the left part of pole tooth IV；In the left side of left pole shoe, magnetism-isolating loop and bearing are installed successively, on the right side of right pole shoe, magnetism-isolating loop and bearing are installed successively；Shell is mounted on an axle, makes jacket live in state the part being mounted on an axle, make the inner side of shell left end be close to be positioned at the bearing in left side；Finally by threadeding of end cap and shell right-hand member, compress the outer ring of the bearing being positioned at right side.
The present invention offers pole tooth and cannelure at middle pole shoe, and offer pole tooth and cannelure on left pole shoe and right pole shoe, the pole tooth on middle pole shoe is made to be positioned at the cannelure on left pole shoe and right pole shoe, and make the pole tooth on left pole shoe and right pole shoe be positioned at the cannelure of middle pole shoe, the labyrinth seal structure of symmetric form bayonet-type, the bearing capacity of this sealing structure is strong, and during seal failure, the loss amount of magnetic fluid is little, can meet the high sealing performance requirement under the special operation conditions such as high-speed overload；Pole tooth and cannelure on middle pole shoe, left pole shoe, right pole shoe are all multiple along being radially arranged of axle, form the radial seal ring of bayonet-type, reduce the axle circular runout in the rotation process impact on seal clearance size, thus improve the stability of sealing property；In the cannelure of middle pole shoe, permanent magnet is installed, the opposite polarity of adjacent permanent magnet, substantially reduces the permanent magnet magnetic circuit to magnetic fluid seal gap location, strengthens the permanent magnet magnetic field force to magnetic fluid, effectively reduce the loss of magnetic fluid, expand the safe condition range of sealing device.
Accompanying drawing explanation
Fig. 1 is the magnetic fluid seal device of magnetic source tandem type
In figure, each sequence number indicates and the structure 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 III, 62-cannelure III, pole shoe in the middle of 7-, 71-pole tooth I, 72-cannelure I, 73-pole tooth II, the right pole shoe of 74-cannelure II, 8-, 81-pole tooth IV, 82-pole tooth IV, 9-jump ring, 10-end cap, 11-groove II, 12-sealing medium, 13-permanent magnet, 14-groove I.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the accompanying drawings.
As it is shown in figure 1, a kind of symmetric form bayonet-type magnetic fluid seal device, including middle pole shoe 7, left pole shoe 6, right pole shoe 8, permanent magnet 13, shell 2；Described middle pole shoe 7 is arranged on the middle part of axle 1, multiple pole tooth I71 is offered in the left side of middle pole shoe 7, offer cannelure I72 between two adjacent pole tooth I71, in cannelure I72, be provided with permanent magnet 13, the opposite polarity of the adjacent permanent magnet 13 in two cannelure I72；Multiple pole tooth II73 is offered in the right side of middle pole shoe 7, offers cannelure II74, be provided with permanent magnet 13, the opposite polarity of the adjacent permanent magnet 13 in two cannelure II74 in cannelure II74 between two adjacent pole tooth II73；Pole tooth I71 and pole tooth II73 is symmetrical relative to middle pole shoe 7；
Described left pole shoe 6 is installed on the axle 1 on the left of middle pole shoe 7, multiple pole tooth III61 and cannelure III62 is offered on the right side of left pole shoe 6, each cannelure I72 of pole shoe 7 left side in the middle of pole tooth III61 one_to_one corresponding respectively, pole tooth III61 stretches in cannelure I72, leaves gap between end and the permanent magnet 13 of pole tooth III61；Each pole tooth I71 of pole shoe 7 left side in the middle of cannelure III62 one_to_one corresponding respectively, pole tooth I71 stretches in cannelure III62, gap is left between end and the right side of cannelure III62 of pole tooth I71, injecting sealing medium 12 in cannelure III62, sealing medium 12 is adsorbed on the left side of pole tooth I71 under the action of a magnetic force；
Described right pole shoe 8 is installed on the axle 1 on the right side of middle pole shoe 7, pole tooth IV 81 and cannelure IV 82 is offered on the left side of right pole shoe 8, each cannelure II74 of pole shoe 7 right side in the middle of pole tooth IV 81 one_to_one corresponding respectively, pole tooth IV 81 stretches in cannelure II74, leaves gap between end and the permanent magnet 13 of pole tooth IV 81；Each pole tooth II73 of pole shoe 7 right side in the middle of cannelure IV 82 one_to_one corresponding respectively, pole tooth II73 stretches in cannelure IV 82, gap is left between pole tooth II73 end and the left side of cannelure IV 82, injecting sealing medium 12 in cannelure IV 82, sealing medium 12 is adsorbed on the right side of pole tooth II73 under the action of a magnetic force.
Also include that jump ring 9, described jump ring 9 are arranged on the axle 1 of middle pole shoe 7 left and right sides, be close to middle pole shoe 7 both sides.
Also include two bearings 3 and two groups of magnetism-isolating loops, two groups of described magnetism-isolating loops are respectively provided on left pole shoe 6 left side and right pole shoe 8 right side, two bearings 3 are installed on axle 1, are respectively provided at the right side of magnetism-isolating loop on the left side of magnetism-isolating loop on left pole shoe 6 left side and right pole shoe 8 right side.
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, and interior magnetism-isolating loop 4 is installed on axle 1, there is gap between outer magnetism-isolating loop 5 and interior magnetism-isolating loop 4, and outer magnetism-isolating loop 5 is identical with the axial length of interior magnetism-isolating loop 4.
Described permanent magnet 13 is radial magnetizing type permanent magnet.
The periphery of left pole shoe 6 offers groove I14, in the periphery of right pole shoe 8 is offered groove II11, described groove I14 and groove II11, rubber ring is installed.
The quantity of pole tooth I71 is 2-8, and its radial height is 0.2-1mm, and the number of cannelure I72 is 1-7, and the radial height of cannelure I72 is 2-8mm；Pole tooth II73 and the quantity of pole tooth I71, equivalently-sized, cannelure II74 and the quantity of cannelure I72, equivalently-sized.
The quantity of described pole tooth III61 is 2-8, and its radial height is 0.2-1mm；The number of cannelure III62 is 2-8, and its radial height is 2-8mm；Pole tooth IV 81 and the quantity of pole tooth III61, equivalently-sized, cannelure IV 82 and the quantity of cannelure III62, equivalently-sized.
Gap length between end and the right side of cannelure III62 of pole tooth I71 is 0.1-5mm, and the gap length between pole tooth II73 end and the left side of cannelure IV 82 is 0.1-5mm.
The installation process of the present invention is as follows: be separately mounted to by permanent magnet 13 in the middle cannelure I72 of pole shoe 7 left side and the cannelure II74 of right side, middle pole shoe 7 is arranged on the middle part of axle 1 again, the middle left side of pole shoe 7 and the axle 1 on right side are respectively mounted jump ring 9；nullRubber ring is installed in the groove I14 of left pole shoe 6 periphery，Rubber ring is installed in the groove II11 of right pole shoe 8 periphery，Sealing medium 12 is injected in the cannelure III62 of left pole shoe 6 right side，Sealing medium is magnetic fluid，Sealing medium 12 is injected in the cannelure IV 82 of right pole shoe 8 left side，This sealing medium is magnetic fluid，On the axle 1 in the left side that more left pole shoe 6 is arranged on middle pole shoe 7，On the axle 1 on the right side that right pole shoe 8 is arranged on middle pole shoe 7，The pole tooth I71 on the left of middle pole shoe 7 is made to stretch in cannelure III62，And contact with the sealing medium in cannelure III62，The pole tooth II73 on the right side of middle pole shoe 7 is made to stretch in cannelure IV 82，And contact with the sealing medium in cannelure IV 82，In tooth III61 in pole stretches into the cannelure I72 on the left of middle pole shoe 7 simultaneously，And there is gap in the left part of the permanent magnet in the right part of pole tooth III61 and cannelure I72，Pole tooth IV 82 stretches into the cannelure II74 on the right side of middle pole shoe 7，And there is gap with the right part of permanent magnet in cannelure II74 in the left part of pole tooth IV 82；In the left side of left pole shoe 6, magnetism-isolating loop and bearing 3 are installed successively, on the right side of right pole shoe 8, magnetism-isolating loop and bearing 3 are installed successively；Shell 2 is arranged on axle 1, makes shell 2 cover the above-mentioned part being arranged on axle 1, make the inner side of shell 2 left end be close to be positioned at the bearing 3 in left side；Finally by threadeding of end cap 10 and shell 2 right-hand member, compress the outer ring of the bearing 3 being positioned at right side.
Claims (10)
1. a symmetric form bayonet-type magnetic fluid seal device, including middle pole shoe (7), left pole shoe (6), right pole shoe (8), permanent magnet (13), shell (2)；It is characterized in that:
Described middle pole shoe (7) is arranged on the middle part of axle (1), multiple pole tooth I(71 is offered in the left side of middle pole shoe (7)), two adjacent pole tooth I(71) between offer cannelure I(72), at cannelure I(72) in be provided with permanent magnet (13), two adjacent cannelure I(72) in the opposite polarity of permanent magnet (13)；Multiple pole tooth II(73 is offered in the right side of middle pole shoe (7)), two adjacent pole tooth II(73) between offer cannelure II(74), at cannelure II(74) in be provided with permanent magnet (13), two adjacent cannelure II(74) in the opposite polarity of permanent magnet (13)；
Described left pole shoe (6) is installed on the axle (1) in middle pole shoe (7) left side, multiple pole tooth III(61 is offered on the right side of left pole shoe (6)) and cannelure III(62), pole tooth III(61) distinguish each cannelure I(72 of pole shoe (7) left side in the middle of one_to_one corresponding), pole tooth III(61) stretch into cannelure I(72) in, pole tooth III(61) end and permanent magnet (13) between leave gap；Cannelure III(62) respectively each pole tooth I(71 of pole shoe (7) left side in the middle of one_to_one corresponding), pole tooth I(71) stretch into cannelure III(62) in, pole tooth I(71) end and cannelure III(62) right side between leave gap；
Described right pole shoe (8) is installed on the axle (1) on middle pole shoe (7) right side, pole tooth IV (81) and cannelure IV (82) is offered on the left side of right pole shoe (8), each cannelure II(74 of pole shoe (7) right side in the middle of pole tooth IV (81) one_to_one corresponding respectively), pole tooth IV (81) stretches into cannelure II(74) in, leave gap between end and the permanent magnet (13) of pole tooth IV (81)；Each pole tooth II(73 of pole shoe (7) right side in the middle of cannelure IV (82) one_to_one corresponding respectively), pole tooth II(73) stretch in cannelure IV (82), pole tooth II(73) leave gap between end and the left side of cannelure IV (82).
2. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterised in that: also include that jump ring (9), described jump ring (9) are arranged on the axle (1) of middle pole shoe (7) left and right sides, be close to middle pole shoe (7) both sides.
3. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterized in that: also include two bearings (3) and two groups of magnetism-isolating loops, two groups of described magnetism-isolating loops are respectively provided on left pole shoe (6) left side and right pole shoe (8) right side, two bearings (3) are installed on axle (1), are respectively provided at the right side of magnetism-isolating loop on the left side of magnetism-isolating loop on left pole shoe (6) left side and right pole shoe (8) right side.
4. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 3, 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 outer magnetism-isolating loop (5) and interior magnetism-isolating loop (4), outer magnetism-isolating loop (5) is identical with the axial length of interior magnetism-isolating loop (4).
5. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterised in that: described permanent magnet (13) is radial magnetizing type permanent magnet.
6. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterized in that: on the periphery of left pole shoe (6), offer groove I(14), the periphery of right pole shoe (8) is offered groove II(11), described groove I(14) and groove II(11) interior installation rubber ring.
7. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterized in that: pole tooth I(71) quantity be 2-8, its radial height is 0.2-1mm, cannelure I(72) number be 1-7, cannelure I(72) radial height be 2-8mm；Pole tooth II(73) with pole tooth I(71) quantity, equivalently-sized, cannelure II(74) with cannelure I(72) quantity, equivalently-sized.
8. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterised in that: quantity described pole tooth III(61) is 2-8, and its radial height is 0.2-1mm；Cannelure III(62) number be 2-8, its radial height is 2-8mm；Pole tooth IV (81) and pole tooth III(61) quantity, equivalently-sized, cannelure IV (82) and cannelure III(62) quantity, equivalently-sized.
9. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterized in that: described pole tooth I(71) end and cannelure III(62) right side between gap length be 0.1-5mm, pole tooth II(73) gap length between end and the left side of cannelure IV (82) is 0.1-5mm.
10. symmetric form bayonet-type magnetic fluid seal device as claimed in claim 1, it is characterised in that: described pole tooth I(71) with pole tooth II(73) symmetrical relative to middle pole shoe (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610599731.1A CN106015583B (en) | 2016-07-28 | 2016-07-28 | A kind of symmetric form bayonet-type magnetic fluid seal device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610599731.1A CN106015583B (en) | 2016-07-28 | 2016-07-28 | A kind of symmetric form bayonet-type magnetic fluid seal device |
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| Publication Number | Publication Date |
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| CN106015583A true CN106015583A (en) | 2016-10-12 |
| CN106015583B CN106015583B (en) | 2017-10-03 |
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| CN201610599731.1A Active CN106015583B (en) | 2016-07-28 | 2016-07-28 | A kind of symmetric form bayonet-type magnetic fluid seal device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113090760A (en) * | 2021-04-07 | 2021-07-09 | 北京交通大学 | Magnetic liquid sealing device |
| CN113790270A (en) * | 2021-09-29 | 2021-12-14 | 北京交通大学 | Embedded sleeve type magnetic liquid sealing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113090760A (en) * | 2021-04-07 | 2021-07-09 | 北京交通大学 | Magnetic liquid sealing device |
| CN113790270A (en) * | 2021-09-29 | 2021-12-14 | 北京交通大学 | Embedded sleeve type magnetic liquid sealing device |
| CN113790270B (en) * | 2021-09-29 | 2022-04-26 | 北京交通大学 | Embedded sleeve type magnetic liquid sealing device |
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| Publication number | Publication date |
|---|---|
| CN106015583B (en) | 2017-10-03 |
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