CN104141796B - The method of magnetic fluid sealing voltage endurance capability is improved with magnetic conductivity nanowire magnetic liquid - Google Patents
The method of magnetic fluid sealing voltage endurance capability is improved with magnetic conductivity nanowire magnetic liquid Download PDFInfo
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- CN104141796B CN104141796B CN201410320505.6A CN201410320505A CN104141796B CN 104141796 B CN104141796 B CN 104141796B CN 201410320505 A CN201410320505 A CN 201410320505A CN 104141796 B CN104141796 B CN 104141796B
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Abstract
The present invention proposes a kind of method that magnetic conductivity nanowire magnetic liquid improves magnetic fluid sealing voltage endurance capability, belong to mechanical engineering technical field of sealing technology, be specially adapted to magnetic fluid sealing.This magnetic conductivity magnetic liquid is that in existing magnetic liquid, add transverse dimension be 10 ~ 100nm, and length is the nano wire of 100 ~ 300 μm, and adds proper amount of surfactant, stirs 40 to five ten minutes, forms magnetic conductivity nanowire magnetic liquid.Described magnetic conductivity nanowire magnetic liquid is injected in the seal clearance of magnetic fluid sealing.Existing magnetic liquid comprises fluorocarbons based magnetic liquid, ester group magnetic liquid etc.Solve the problem that existing magnetic fluid sealing voltage endurance capability is lower.
Description
Technical field
The invention belongs to mechanical engineering technical field of sealing technology, be specially adapted to magnetic fluid sealing.
Background technique
Along with the develop rapidly in the fields such as machinery, chemical industry, more and more higher requirement is proposed to sealability.Traditional seal form, as mechanical seal, brush seal etc. cannot meet the requirement of a lot of applications zero leakage.Magnetic fluid sealing has zero leakage, the long lifetime, the advantages such as high reliability, is thus widely used in fields such as machinery, chemical industry.But the voltage endurance capability of magnetic fluid sealing is lower, this deficiency limits the application of magnetic fluid sealing.And nano wire is as a kind of new composite, there is sectional dimension little, the advantages such as good mechanical property.This method makes full use of the advantage of nano wire and magnetic fluid sealing, has great importance to the voltage endurance capability improving magnetic fluid sealing.
Summary of the invention
Technical problem to be solved by this invention is: existing magnetic fluid sealing voltage endurance capability is lower.Therefore propose a kind of method that magnetic conductivity nanowire magnetic liquid improves magnetic fluid sealing voltage endurance capability, use this magnetic conductivity nanowire magnetic liquid to replace the common magnetic liquid in magnetic fluid seal device can improve the voltage endurance capability of magnetic fluid seal device.
Technological scheme of the present invention:
A kind of magnetic conductivity nanowire magnetic liquid improves the method for magnetic fluid sealing voltage endurance capability, the particular content of the method is as follows: first in the solution being dissolved with magnetic conductivity nano wire, filtering out transverse dimension is 10 ~ 100nm, and length is the nano wire of 100 ~ 300 μm.Then in magnetic liquid, add the above-mentioned nano wire that volume is magnetic fluid volume 5% ~ 7%, and add appropriate surface active agent, to prevent nano wire from precipitating, stir 40 to five ten minutes, form magnetic conductivity nanowire magnetic liquid.Described magnetic conductivity nanowire magnetic liquid is injected in the seal clearance of magnetic fluid sealing.
Described magnetic conductivity nanowire magnetic liquid improves in the method for magnetic fluid sealing voltage endurance capability, and the magnetic liquid used can select fluorocarbons based magnetic liquid, ester group magnetic liquid etc. according to sealing medium and sealed environment.
Beneficial effect of the present invention:
Because the present invention is that to add volume in magnetic liquid be the nano wire that the magnetic conductive material of magnetic fluid volume 5% ~ 7% is made, under Action of Surfactant, additional nano wire can long-term stability be suspended in magnetic liquid.Nano wire is made up of magnetic conductive material, so when this magnetic conductivity nanowire magnetic liquid is joined in magnetic fluid seal device, during magnetic fluid sealing work, permanent magnet can form certain axial magnetic field gradient between the pole tooth of pole shoe and rotating shaft, makes nano wire be subject to the effect of axial force of magnetic field; And produce elastic force because nano wire, under sealing medium effect, certain resiliently deformable can occur, like this, magnetic force and elastic force can the pressure reduction that produce of balanced seal to a certain extent, improve the voltage endurance capability of magnetic fluid sealing.
Accompanying drawing explanation
When Fig. 1 magnetic fluid sealing uses common magnetic liquid, the phase diagram of the front pole tooth lower seal liquid that pressurizes.
During Fig. 2 magnetic fluid sealing use magnetic conductivity nanowire magnetic liquid, the phase diagram of the front pole tooth lower seal liquid that pressurizes.
When Fig. 3 magnetic fluid sealing uses common magnetic liquid, the phase diagram of pole tooth lower seal liquid after pressurization.
During Fig. 4 magnetic fluid sealing use magnetic conductivity nanowire magnetic liquid, the phase diagram of pole tooth lower seal liquid after pressurization.
Embodiment
Mode of execution one
First be dissolved with in magnetic conductivity nanowire solution, filtering out transverse dimension is 10 ~ 30nm, and length is the nano wire of 100 ~ 150 μm.Then in the fluorocarbons based magnetic liquid that buying is next, add the above-mentioned nano wire that volume is magnetic fluid volume 5%, and add appropriate surface active agent, to prevent nano wire from precipitating, stir 40 minutes, form magnetic conductivity nanowire magnetic liquid.Described magnetic conductivity nanowire magnetic liquid is injected in the seal clearance of magnetic fluid sealing.
Mode of execution two
First be dissolved with in magnetic conductivity nanowire solution, filtering out transverse dimension is 30 ~ 70nm, and length is the nano wire of 150 ~ 250 μm.Then in the ester group magnetic liquid that buying is next, add the above-mentioned nano wire that volume is magnetic fluid volume 6%, and add proper amount of surfactant, to prevent nano wire from precipitating, stir 45 minutes, form magnetic conductivity nanowire magnetic liquid.Described magnetic conductivity nanowire magnetic liquid is injected in magnetic fluid sealing gap.
Adopt magnetic conductivity nanowire magnetic liquid in magnetic fluid sealing after, the nano wire between pole tooth and rotating shaft in magnetic conductivity nanowire magnetic liquid radially will arrange under magnetic fields, as shown in accompanying drawing 1,2.After the pressurization of Sealing side, permanent magnet can form certain axial magnetic field gradient between the pole tooth of pole shoe and rotating shaft, makes magnetic conductivity nano wire be subject to the effect of axial force of magnetic field; And produce elastic force because magnetic conductivity nano wire, under sealing medium effect, certain resiliently deformable can occur, like this, magnetic force and elastic force can the pressure reduction that produce of balanced seal to a certain extent, improve the voltage endurance capability of magnetic fluid sealing, as shown in accompanying drawing 3,4.
Claims (1)
1. improve the method for magnetic fluid sealing voltage endurance capability with magnetic conductivity nanowire magnetic liquid, it is characterized in that:
First be dissolved with in magnetic conductivity nanowire solution, filtering out transverse dimension is 10 ~ 100nm, length is the nano wire of 100 ~ 300 μm, then in magnetic liquid, add the above-mentioned nano wire that volume is magnetic fluid volume 5% ~ 7%, and add appropriate surface active agent, to prevent nano wire from precipitating, stir 40 to five ten minutes, form magnetic conductivity nanowire magnetic liquid; Described magnetic conductivity nanowire magnetic liquid is injected in the seal clearance of magnetic fluid sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410320505.6A CN104141796B (en) | 2014-07-04 | 2014-07-04 | The method of magnetic fluid sealing voltage endurance capability is improved with magnetic conductivity nanowire magnetic liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410320505.6A CN104141796B (en) | 2014-07-04 | 2014-07-04 | The method of magnetic fluid sealing voltage endurance capability is improved with magnetic conductivity nanowire magnetic liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104141796A CN104141796A (en) | 2014-11-12 |
| CN104141796B true CN104141796B (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410320505.6A Expired - Fee Related CN104141796B (en) | 2014-07-04 | 2014-07-04 | The method of magnetic fluid sealing voltage endurance capability is improved with magnetic conductivity nanowire magnetic liquid |
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| CN (1) | CN104141796B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1365124A (en) * | 2002-02-09 | 2002-08-21 | 马鞍山金科粉体工程有限公司 | Ferrite nano magnetic liquid |
| CN2660236Y (en) * | 2003-12-01 | 2004-12-01 | 北京交通大学 | Device of increasing magnetic liquid sealing pressure durable abilities of reciprocating shaft |
| CN103762056A (en) * | 2014-01-17 | 2014-04-30 | 北京交通大学 | Magnetic liquid seal method with high rotation speed resisting capability |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10331439B3 (en) * | 2003-07-10 | 2005-02-03 | Micromod Partikeltechnologie Gmbh | Magnetic nanoparticles with improved magnetic properties |
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2014
- 2014-07-04 CN CN201410320505.6A patent/CN104141796B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1365124A (en) * | 2002-02-09 | 2002-08-21 | 马鞍山金科粉体工程有限公司 | Ferrite nano magnetic liquid |
| CN2660236Y (en) * | 2003-12-01 | 2004-12-01 | 北京交通大学 | Device of increasing magnetic liquid sealing pressure durable abilities of reciprocating shaft |
| CN103762056A (en) * | 2014-01-17 | 2014-04-30 | 北京交通大学 | Magnetic liquid seal method with high rotation speed resisting capability |
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| Publication number | Publication date |
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| CN104141796A (en) | 2014-11-12 |
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