CN105351528A - Magnetic liquid magnetic sealing device suitable for high rotating speed condition - Google Patents
Magnetic liquid magnetic sealing device suitable for high rotating speed condition Download PDFInfo
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- CN105351528A CN105351528A CN201510746261.2A CN201510746261A CN105351528A CN 105351528 A CN105351528 A CN 105351528A CN 201510746261 A CN201510746261 A CN 201510746261A CN 105351528 A CN105351528 A CN 105351528A
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Abstract
The invention relates to a magnetic liquid magnetic sealing device suitable for a high rotating speed condition, and belongs to the technical field of mechanical engineering sealing. The magnetic liquid magnetic sealing device is especially suitable for high-rotating-speed sealing. According to the magnetic liquid magnetic sealing device, the problems that a traditional magnetic seal is low in pressure resistance and not suitable for the high rotating speed condition are solved. The magnetic liquid magnetic sealing device suitable for the high rotating speed condition is provided by organically combining the magnetic liquid lubricating and sealing technology and an existing magnetic sealing method. By means of the device, the pressure resistance of the magnetic seal can be effectively improved, and the magnetic seal is made to be suitable for the high-rotating-speed dynamic seal condition; the defects of the magnetic seal are overcome, the application range of the existing magnetic seal is greatly expanded, and the magnetic seal is made to have the advantages of being free of leakage, high in reliability and the like.
Description
Technical field
The invention belongs to mechanical engineering technical field of sealing technology, be specially adapted to the sealing of high rotating speed.
Background technique
Mechanical seal is a kind of rotation axis moving seal of extensive use, there is working stability, the feature such as applied widely, but cause dry friction in mechanical seal end surface lubricating oil breakdown under high speed conditions, make end wear serious, therefore be not suitable for high rotating speed motive sealing, magnetic seal is the one of mechanical seal, and magnetic seal utilizes the magnetic fields of magnetic material, compensated ring component and uncompensated ring assembly are attracted each other, realizes compensated loop and uncompensated ring rubbing surface fits tightly.Compared with loading end face seal with ordinary elasticity, the major advantage of magnetic seal is that structural element is few, compact, easy for installation.Replace the elastic force of elastic element with magnetic force, overcome by manufacturing, axial displacement brings in alignment error and working procedure impact and make contact load change large problem.Therefore, the wearing and tearing of magnetic seal device are low, the life-span long, reliable operation.But magnetic seal is little compared with spring force due to the magnetic force utilizing permanent magnet to produce, be only applicable to the occasion that sealed medium pressure is not high, also there is the shortcoming not being suitable for high speed conditions simultaneously.Magnetic liquid can use as oiling agent, and magnetic particle size wherein only has 5 ~ 10nm, and specific surface roughness is much thin, generally can not cause wearing and tearing.Utilize externally-applied magnetic field that it can be made to remain on lubricant housings, be full of lubricated surface exactly, consumption is few and reliable, there is excellent bearing capacity, good antiwear and antifriction, resistance to high rotating speed and self-repair function, both can ensure that contact area lubricating status was stablized in greasing, there will not be unlubricated friction, can seal again Leakage prevention and outside contamination simultaneously.Magnetic fluid sealing is a kind of novel seal, its have tight sealing, immeasurablel leak-down rate, long lifetime, reliability high, the feature such as not pollute; Even if magnetic fluid sealing is when interrupt run, also unlike the impact be resiliently sealed in by speedup and relaxation between down period, just because of this, magnetic fluid sealing has important irreplaceable effect in a lot of industry.
Summary of the invention
Technical problem to be solved by this invention:
Solve the problem that conventional magnetic sealing voltage endurance capability is low, be not suitable for high speed conditions, improve the voltage endurance capability of magnetic seal and make it be applicable to high rotating speed motive sealing condition.
The present invention solves the technological scheme of its technical problem:
Be applicable to a magnetic liquid magnetic sealing device for high speed conditions, it is characterized in that:
This device comprises rotating ring O type circle, permanent magnet, rotating ring, magnetic liquid, envelope seat, stationary ring O type circle, permanent magnetism stationary ring;
Rotating ring inside loads permanent magnet, adopts interference fit between the two;
With the sealing of rotating ring O type circle between rotating ring and axle, seal with stationary ring O type circle between permanent magnetism stationary ring and envelope seat;
Rotating ring O type circle drives rotating ring to rotate with axle while sealing, and stationary ring O type circle keeps permanent magnetism stationary ring to locate with envelope seat while sealing;
Fitted by magnetic attraction between rotating ring and permanent magnetism stationary ring and there is magnetic liquid between its end face;
Envelope seat being designed to proprietary flange flange threaded fastener is arranged on the equipment of needs sealing;
Envelope seat adopts non-magnetic alloy material to make; Rotating ring adopts non-magnetic oil resisting material to make; Permanent magnet and permanent magnetism stationary ring adopt the permanent-magnet material had excellent magnetic characteristics to make;
By permanent magnet and permanent magnetism stationary ring opposite pole staggered relatively so that produce magnetic force make rotating ring and stationary ring laminating; Make to form flux path between permanent magnet, rotating ring, magnetic liquid, permanent magnetism stationary ring;
The radial width of permanent magnetism stationary ring is less than the radial width of rotating ring, makes magnetic liquid evenly be coated on permanent magnetism stationary ring end face and surrounding thereof;
Magnetic liquid should select that vapo(u)rability is low, the magnetic liquid of saturation magnetization high type, as fluorine ether oil based magnetic liquid;
The beneficial effect that the present invention has:
At a certain amount of magnetic liquid of stationary ring end face uniform adsorption, first permanent magnetism stationary ring and envelope seat are fixed, by the non-magnetic rotating ring of embedded permanent magnet near permanent magnetism stationary ring, because two permanent magnet opposite poles are staggered relatively, the magnetic pull that rotating ring is subject to permanent magnet is moved to stationary ring, magnetic liquid between rotating ring and stationary ring end face is compressed, and because stationary ring radial dimension is less than rotating ring, the magnetic liquid be forced out is attracted to the side of permanent magnetism stationary ring; Magnetic liquid viscosity under magnetic fields increases, and the static pressure bearing capacity of magnetic liquid is strengthened, can form certain thickness magnetic liquid lubrication film between rotating ring and stationary ring.Because in rotary course, rotating ring does not directly contact with stationary ring, the wearing and tearing of the wearing and tearing of magnetic seal reduce greatly, make it run at high speed; Forming magnetic field between two permanent magnets can make magnetic liquid accurately be evenly distributed between rotating ring and stationary ring end face, ensures that lubricating status is stablized in greasing, there will not be unlubricated rubbing.Due to the magnetic responsiveness characteristic of magnetic liquid, when between end face magnetic liquid because of start suddenly or stop reduce time magnetic liquid film automatically can supplement recovery.Magnetic liquid simultaneously between end face seals Leakage prevention and outside contamination, because magnetic fluid sealing has zero leakage, life-span length, reliability high, and magnetic fluid sealing voltage endurance capability is higher than general magnetic seal voltage endurance capability, therefore the present invention substantially increases the usability of magnetic seal, makes it reach zero leakage and improves the voltage endurance capability of magnetic seal.Owing to adopting in the present invention, vapo(u)rability is low, the magnetic liquid of saturation magnetization high type, decreases the loss amount of magnetic liquid and improves the voltage endurance capability of magnetic fluid sealing, making magnetic liquid be operated in various environment as sealing compound and lubricant stable.In sum, the invention solves the problem that conventional magnetic sealing voltage endurance capability is low, be not suitable for high speed conditions, by magnetic liquid lubrication and sealing technique and existing magnetic seal method are organically combined, propose a kind of magnetic liquid magnetic sealing device being applicable to high speed conditions, this device effectively can improve the voltage endurance capability of magnetic seal and make it be applicable to high rotating speed motive sealing condition, compensate for the shortcoming of magnetic seal, the great application area expanding existing magnetic seal, and make it have zero leakage, reliability other advantages high.These invention market prospects are boundless, will produce huge social economic benefit.This invention simultaneously has important reference as the combination seal of mechanical seal and magnetic fluid sealing to the design of other combined labyrinth and carbon glands.
Accompanying drawing explanation
A kind of magnetic liquid magnetic sealing device erection drawing being applicable to high speed conditions of Fig. 1.
In figure: rotating ring O type circle (1), permanent magnet (2), rotating ring (3), magnetic liquid (4), envelope seat (5), stationary ring O type circle (6), permanent magnetism stationary ring (7);
The invention will be further described by reference to the accompanying drawings.
This device comprises rotating ring O type circle (1), permanent magnet (2), rotating ring (3), magnetic liquid (4), envelope seat (5), stationary ring O type circle (6), permanent magnetism stationary ring (7);
Rotating ring (3) inside loads permanent magnet (2), adopts interference fit between the two;
Seal with rotating ring O type circle (1) between rotating ring (3) and rotating shaft, seal with stationary ring O type circle (6) between permanent magnetism stationary ring (7) and envelope seat (5);
Rotating ring O type circle (1) drives rotating ring (3) to rotate with axle while sealing, and stationary ring O type circle (6) keeps permanent magnetism stationary ring (7) to locate with envelope seat (5) while sealing;
Fitted by magnetic attraction between rotating ring (3) and permanent magnetism stationary ring (7) and between its end face, there is magnetic liquid (4);
Envelope seat (5) being designed to proprietary flange flange threaded fastener is arranged on the equipment of needs sealing;
Envelope seat (5) adopts non-magnetic alloy material to make; Rotating ring (3) adopts non-magnetic oil resisting material to make; Permanent magnet (2) and permanent magnetism stationary ring (7) adopt the permanent-magnet material had excellent magnetic characteristics to make;
By permanent magnet (2) and permanent magnetism stationary ring (7) opposite pole staggered relatively so that produce magnetic force make rotating ring (3) and stationary ring (7) laminating; Permanent magnet (2), rotating ring (3), magnetic liquid (4), permanent magnetism stationary ring is made to form flux path between (7);
The radial width of permanent magnetism stationary ring (7) is less than the radial width of rotating ring (3), makes magnetic liquid evenly be coated on permanent magnetism stationary ring (7) end face and surrounding thereof;
Magnetic liquid (4) should select that vapo(u)rability is low, the magnetic liquid of saturation magnetization high type, as fluorine ether oil based magnetic liquid.
Claims (5)
1. be applicable to a magnetic liquid magnetic sealing device for high speed conditions, it is characterized in that:
This device comprises rotating ring O type circle (1), permanent magnet (2), rotating ring (3), magnetic liquid (4), envelope seat (5), stationary ring O type circle (6), permanent magnetism stationary ring (7);
Rotating ring (3) inside loads permanent magnet (2), adopts interference fit between the two;
Seal with rotating ring O type circle (1) between rotating ring (3) and rotating shaft, seal with stationary ring O type circle (6) between permanent magnetism stationary ring (7) and envelope seat (5);
Rotating ring O type circle (1) drives rotating ring (3) to rotate with axle while sealing, and stationary ring O type circle (6) keeps permanent magnetism stationary ring (7) to locate with envelope seat (5) while sealing;
Fitted by magnetic attraction between rotating ring (3) and permanent magnetism stationary ring (7) and between its end face, there is magnetic liquid (4);
Envelope seat (5) is designed to proprietary flange flange threaded fastener be arranged on the equipment of needs sealing.
2. a kind of magnetic liquid magnetic sealing device being applicable to high speed conditions according to claim 1, is characterized in that: envelope seat (5) adopts non-magnetic alloy material to make; Rotating ring (3) adopts non-magnetic oil resisting material to make; Permanent magnet (2) and permanent magnetism stationary ring (7) adopt the permanent-magnet material had excellent magnetic characteristics to make.
3. a kind of magnetic liquid magnetic sealing device being applicable to high speed conditions according to claim 1, it is characterized in that: by permanent magnet (2) and permanent magnetism stationary ring (7) opposite pole staggered relatively so that produce magnetic force make rotating ring (3) and stationary ring (7) laminating; Permanent magnet (2), rotating ring (3), magnetic liquid (4), permanent magnetism stationary ring is made to form flux path between (7).
4. a kind of magnetic liquid magnetic sealing device being applicable to high speed conditions according to claim 1, it is characterized in that: the radial width of permanent magnetism stationary ring (7) is less than the radial width of rotating ring (3), make magnetic liquid evenly be coated on permanent magnetism stationary ring (7) end face and surrounding thereof.
5. a kind of magnetic liquid magnetic sealing device being applicable to high speed conditions according to claim 1, it is characterized in that: magnetic liquid described in claim 1 (4) should select that vapo(u)rability is low, the magnetic liquid of saturation magnetization high type, as fluorine ether oil based magnetic liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510746261.2A CN105351528B (en) | 2015-11-06 | 2015-11-06 | A kind of magnetic liquid magnetic sealing device suitable for high speed conditions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510746261.2A CN105351528B (en) | 2015-11-06 | 2015-11-06 | A kind of magnetic liquid magnetic sealing device suitable for high speed conditions |
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| CN105351528A true CN105351528A (en) | 2016-02-24 |
| CN105351528B CN105351528B (en) | 2018-01-02 |
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| CN201510746261.2A Expired - Fee Related CN105351528B (en) | 2015-11-06 | 2015-11-06 | A kind of magnetic liquid magnetic sealing device suitable for high speed conditions |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822768A (en) * | 2016-05-25 | 2016-08-03 | 广西科技大学 | Series connection type end face type magnetic fluid sealing device |
| CN105972218A (en) * | 2016-05-25 | 2016-09-28 | 广西科技大学 | End surface type magnetic fluid sealing device |
| CN105972219A (en) * | 2016-07-29 | 2016-09-28 | 广西科技大学 | Staggered tooth end face type magnetic fluid sealing device |
| CN106015583A (en) * | 2016-07-28 | 2016-10-12 | 广西科技大学 | Symmetrical staggered-tooth type magnetic fluid sealing device |
| CN106224556A (en) * | 2016-05-25 | 2016-12-14 | 广西科技大学 | A kind of many magnetic sources end-surface type magnetic fluid seal device |
| CN106224557A (en) * | 2016-05-25 | 2016-12-14 | 广西科技大学 | A kind of mixing is for magnetic-type end-surface type magnetic fluid seal device |
| CN110285217A (en) * | 2019-06-27 | 2019-09-27 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of four magnetic pole magnetic sealing devices |
| CN112268103A (en) * | 2020-11-13 | 2021-01-26 | 中国船舶重工集团公司第七0三研究所 | Spiral magnetic force combined sealing structure for end face sealing |
| CN114382893A (en) * | 2021-12-15 | 2022-04-22 | 清华大学 | Dynamic pressure type self-circulation magnetic liquid sealing device |
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| SU1352130A1 (en) * | 1986-05-26 | 1987-11-15 | Дзержинский филиал Ленинградского научно-исследовательского и конструкторского института химического машиностроения | Magnetic fluid seal |
| JPH11141561A (en) * | 1997-11-04 | 1999-05-25 | Uchiyama Mfg Corp | Magnetic fluid seal |
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| CN204284455U (en) * | 2014-11-04 | 2015-04-22 | 南京工业大学 | Magnetic fluid dynamic pressure lubrication mechanical sealing device |
| GB2521444A (en) * | 2013-12-20 | 2015-06-24 | Skf Ab | Sealing arrangement |
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- 2015-11-06 CN CN201510746261.2A patent/CN105351528B/en not_active Expired - Fee Related
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| SU1352130A1 (en) * | 1986-05-26 | 1987-11-15 | Дзержинский филиал Ленинградского научно-исследовательского и конструкторского института химического машиностроения | Magnetic fluid seal |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822768A (en) * | 2016-05-25 | 2016-08-03 | 广西科技大学 | Series connection type end face type magnetic fluid sealing device |
| CN105972218A (en) * | 2016-05-25 | 2016-09-28 | 广西科技大学 | End surface type magnetic fluid sealing device |
| CN106224556A (en) * | 2016-05-25 | 2016-12-14 | 广西科技大学 | A kind of many magnetic sources end-surface type magnetic fluid seal device |
| CN106224557A (en) * | 2016-05-25 | 2016-12-14 | 广西科技大学 | A kind of mixing is for magnetic-type end-surface type magnetic fluid seal device |
| CN105972218B (en) * | 2016-05-25 | 2018-06-08 | 广西科技大学 | A kind of end-surface type magnetic fluid seal device |
| CN106015583A (en) * | 2016-07-28 | 2016-10-12 | 广西科技大学 | Symmetrical staggered-tooth type magnetic fluid sealing device |
| CN105972219A (en) * | 2016-07-29 | 2016-09-28 | 广西科技大学 | Staggered tooth end face type magnetic fluid sealing device |
| CN110285217A (en) * | 2019-06-27 | 2019-09-27 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of four magnetic pole magnetic sealing devices |
| CN112268103A (en) * | 2020-11-13 | 2021-01-26 | 中国船舶重工集团公司第七0三研究所 | Spiral magnetic force combined sealing structure for end face sealing |
| CN114382893A (en) * | 2021-12-15 | 2022-04-22 | 清华大学 | Dynamic pressure type self-circulation magnetic liquid sealing device |
| CN114382893B (en) * | 2021-12-15 | 2023-01-13 | 清华大学 | Dynamic pressure type self-circulation magnetic liquid sealing device |
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| CN105351528B (en) | 2018-01-02 |
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