CN103789068B - A kind of magnetic flow liquid for sealing - Google Patents
A kind of magnetic flow liquid for sealing Download PDFInfo
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- CN103789068B CN103789068B CN201410022903.XA CN201410022903A CN103789068B CN 103789068 B CN103789068 B CN 103789068B CN 201410022903 A CN201410022903 A CN 201410022903A CN 103789068 B CN103789068 B CN 103789068B
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Abstract
The present invention proposes a kind of magnetic flow liquid for sealing, this magnetic flow liquid is made up of the magnetic-particle of micro-nano, base load liquid and additive, the mass percent of the magnetic-particle of described micro-nano is 47 ~ 89.5%, wherein, the quality of micron order magnetic-particle and nano-sized magnetic particles is 0.2:1 ~ 4.5:1 than scope, in addition, the particle size range of micron order magnetic is 2 μm ~ 20 μm, the particle size range of nano-sized magnetic particles is 1nm ~ 15nm, the mass percent of described additive is 0.5 ~ 3%, and the mass percent of described base load liquid is 10 ~ 50%.The magnetic flow liquid that the present invention relates to, the magnetic flow liquid sealing effectiveness compared by single micron order magnetic-particle is obtained is more excellent, can meet the requirement of sealing " zero leakage "; Compare the magnetic liquid obtained by single nano-sized magnetic particles, its magnetic permeability is higher, thus the voltage endurance capability of this magnetorheological fluid sealing device of application is significantly improved.
Description
Technical field
The present invention relates to a kind of magnetic flow liquid, being specially a kind of magnetic flow liquid for sealing.
Background technology
Magnetic flow liquid forms primarily of micron order ferromagnetic particle, base load liquid and additive, that one can become semisolid even solid from free-pouring liquid rotating moment under additional the action of a magnetic field, present the intelligent material of controllable rheology characteristic, be mainly used in the field such as vibration damping, polishing.Magnetic liquid is the magnetic fluent meterial be dispersed in by nano-sized magnetic particles in base load liquid, is mainly used in the fields such as sealing, lubrication, heat transfer.Magnetic flow liquid is compared magnetic liquid and is had higher magnetic permeability, in sealing applications process, voltage endurance capability is relatively high, but the magnetic flow liquid be made up of single micron order magnetic-particle shows class solid state under the action of a magnetic field, realize sealing " zero leakage " relatively difficulty, and there is the problems such as thermal value is large in dynamic seal application process, in addition, the magnetic permeability of magnetic liquid is relatively low, makes magnetic liquid voltage endurance capability in seal process limited.Therefore, how effectively change the class solid state of magnetic flow liquid under the action of a magnetic field and realize sealing " zero leakage ", the magnetic permeability simultaneously improving magnetic seal medium is the difficult problem that magnetic flow liquid is applied in field of sealing technology.For this reason, the present invention proposes a kind of magnetic flow liquid being made up of suspending phase micro-nano magnetic-particle, to promote that magnetic flow liquid is in the widespread use of field of sealing technology.
Summary of the invention
Technical problem to be solved by this invention:
For magnetic liquid voltage endurance capability in sealing applications this problem low, the present invention spy proposes a kind of magnetic flow liquid be jointly made up as suspending phase of micro-nano magnetic-particle, the magnetic permeability that this magnetic flow liquid compares the magnetic liquid be made up of nano-sized magnetic particles is larger, the voltage endurance capability being applied to tightness system is higher, and this magnetic flow liquid effectively can improve the class solid state of magnetic flow liquid under the action of a magnetic field be made up of micron order magnetic-particle, meet " zero leakage " requirement needed for sealing applications, there is good application prospect.
Technical scheme of the present invention:
This magnetic flow liquid is made up of the magnetic-particle of micro-nano, base load liquid and additive.The magnetic-particle of described micro-nano is made up of micron order magnetic-particle and nano-sized magnetic particles, its mass percent is 47 ~ 89.5%, and the quality of micron order magnetic-particle and nano-sized magnetic particles is 0.2:1 ~ 4.5:1 than scope, wherein, micron order magnetic-particle particle size range is 2 μm ~ 20 μm, and nano-sized magnetic particles particle size range is 1nm ~ 15nm, in addition, the mass percent of described base load liquid is 10 ~ 50%, and the mass percent of described additive is 0.5 ~ 3%.Described additive is oleic acid, and described base load liquid is any one in deionized water, silicone oil, mineral oil, hydrocarbon-type oil, glycerol.The magnetic flow liquid that micron order magnetic-particle is corresponding shows as class solid under the action of a magnetic field, generally presents relatively hard tufted structure, easily occurs microgap between each micro-bunch of group, easily causes by the leakage of sealing member if be applied in tightness system; Magnetic liquid be a kind of nano-sized magnetic particles that adopts as the liquid of suspending phase, be still liquid under the action of a magnetic field, continuity is better, but magnetic flow liquid magnetic permeability is lower relatively, so that voltage endurance capability is limited in sealing applications.Adopt the magnetic flow liquid that certain component micro-nano magnetic-particle obtains as suspending phase, under the action of a magnetic field, microcosmic shows as, micro-nano magnetic-particle is along magnetic line of force direction ordered arrangement, micron order magnetic-particle forms backbone structure, nano-scale particle effectively can fill up the gap between micron particles, forms fine and close chain structure; Macroscopically show as, mutually fill up between the class solid matter that the liquid state material that under the action of a magnetic field, nano-sized magnetic particles is corresponding is corresponding with micron order magnetic-particle, form one stable sealing ply.The magnetic flow liquid of this invention correspondence can meet the sealing demand of required high withstand voltage, the zero leakage of sealing.
Beneficial effect of the present invention:
The present invention be a kind of by micro-nano magnetic-particle jointly as the magnetic flow liquid that suspending phase is made, this magnetic flow liquid effectively can improve the class solid state of magnetic flow liquid under the action of a magnetic field be made up of micron order magnetic-particle, meets " zero leakage " requirement needed for sealing applications; This magnetic flow liquid is high compared with the magnetic permeability of the magnetic liquid be made up of nano-sized magnetic particles, and the voltage endurance capability applying this magnetorheological fluid sealing device is significantly improved, and application prospect is more wide.
Embodiment
First in beaker, inject 400 ml deionized water, then take 18 grams of micron order magnetic-particles and 12 grams of nano-sized magnetic particles, evenly pour into respectively and fill in the beaker of deionized water, stir, and be heated to 80 DEG C, then add the oleic acid of 12 milliliters, stir 3 hours at 80 DEG C of temperature.Then, the mixed solution after heating is poured out from beaker, and it is cleaned, repeatedly clean with deionized water, until mixture potential of hydrogen is in neutral, mix with 16 grams of base load liquid mineral oil after vacuum drying, stir 2 hours, on ball mill, finally carry out mechanically mixing the magnetic flow liquid that the present invention is applied to sealing within 5 hours, can be obtained.Tested from sealing material dynamic seal, under equal conditions, the voltage endurance capability of magnetic liquid of the present invention is more than 3 times of common magnetic liquid voltage endurance capability.
Claims (1)
1. the magnetic flow liquid for sealing, it is characterized in that: its preparation method is, first in beaker, inject 400 ml deionized water, then 18 grams of micron order magnetic-particles and 12 grams of nano-sized magnetic particles are taken, evenly pouring into respectively fills in the beaker of deionized water, stirs, and is heated to 80 DEG C, add the oleic acid of 12 milliliters again, stir 3 hours at 80 DEG C of temperature; Then, the mixed solution after heating is poured out from beaker, and it is cleaned, repeatedly clean with deionized water, until mixture potential of hydrogen is in neutral, mixes with 16 grams of base load liquid mineral oil after vacuum drying, stir 2 hours, finally on ball mill, carrying out mechanically mixing 5 hours, obtaining the magnetic flow liquid for sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410022903.XA CN103789068B (en) | 2014-01-17 | 2014-01-17 | A kind of magnetic flow liquid for sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410022903.XA CN103789068B (en) | 2014-01-17 | 2014-01-17 | A kind of magnetic flow liquid for sealing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103789068A CN103789068A (en) | 2014-05-14 |
| CN103789068B true CN103789068B (en) | 2015-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410022903.XA Expired - Fee Related CN103789068B (en) | 2014-01-17 | 2014-01-17 | A kind of magnetic flow liquid for sealing |
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| CN (1) | CN103789068B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190287703A1 (en) * | 2016-07-21 | 2019-09-19 | Kurimoto, Ltd. | Magnetorheological fluid |
| CN107914839A (en) * | 2017-10-30 | 2018-04-17 | 黄丽贤 | A kind of cabin is met an urgent need craft leakage mending method |
| CN108364743B (en) * | 2018-04-17 | 2020-03-31 | 中国人民解放军陆军勤务学院 | Three-phase magnetorheological fluid and preparation method thereof |
| CN110939739B (en) * | 2019-12-16 | 2020-08-21 | 清华大学 | Magnetic powder and magnetic liquid combined sealing device |
-
2014
- 2014-01-17 CN CN201410022903.XA patent/CN103789068B/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| "磁流变液屈服应力的管道流测试方法研究";金昀等;《实验力学》;19980630;第13卷(第2期);第168-173页 * |
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| CN103789068A (en) | 2014-05-14 |
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