JP2699404B2 - Electrorheological fluid - Google Patents
Electrorheological fluidInfo
- Publication number
- JP2699404B2 JP2699404B2 JP63105570A JP10557088A JP2699404B2 JP 2699404 B2 JP2699404 B2 JP 2699404B2 JP 63105570 A JP63105570 A JP 63105570A JP 10557088 A JP10557088 A JP 10557088A JP 2699404 B2 JP2699404 B2 JP 2699404B2
- Authority
- JP
- Japan
- Prior art keywords
- specific gravity
- oil
- organic dye
- dye
- particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D37/00—Clutches in which the drive is transmitted through a medium consisting of small particles, e.g. centrifugally speed-responsive
- F16D37/008—Clutches in which the drive is transmitted through a medium consisting of small particles, e.g. centrifugally speed-responsive the particles being carried by a fluid, to vary viscosity when subjected to electric change, i.e. electro-rheological or smart fluids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
- C10M171/001—Electrorheological fluids; smart fluids
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は絶縁性油に固体粒子を混合した懸濁液の粘度
が外部電界によつて著しく増加する電気粘性流体に関す
るもので、動力伝達クラツチ，及びダンパ等の差動流体
として利用されるものである。Description: Object of the Invention (Industrial application field) The present invention relates to an electrorheological fluid in which the viscosity of a suspension in which solid particles are mixed with insulating oil is significantly increased by an external electric field. This is used as a differential fluid such as a power transmission clutch and a damper.
（従来の技術） 本発明に係る従来技術としては、特公昭52−30274号
公報がある。(Prior Art) As a conventional technique according to the present invention, there is Japanese Patent Publication No. 52-30274.
このものは固体粒子としてイオン交換樹脂を用いて迅
速な応答を与える電気流体組成物に関するもので、芳香
族ポリカルボン酸の高級アルキルエステルを特定の粒径
をもつイオン交換樹脂と組合せて誘起せん断応力を高め
たものである。This relates to an electrofluid composition that gives a quick response using ion exchange resin as solid particles, and combines higher alkyl esters of aromatic polycarboxylic acids with ion exchange resins having a specific particle size to induce shear stress. It is something which raised.
（発明が解決しようとする課題） しかし前記電気流体組成物は、水分を吸着した粒子を
分散させた絶縁性油に高電界を印加した場合に、著しく
絶縁破壊しやすいので、多量の電流が流れ高い粘性効果
が望めなく、分散粒子の比重が分散媒体である絶縁性油
の比重よりも大きいために、安定で均一な分散状態を維
持しがたく、分散粒子の沈降を招き、従つて動力伝達用
クラツチに使用した場合に粘性効果の低下とクラツチ配
管部の不具合の原因となり易く、又分散粒子に水分が吸
着しているために電気粘性流体の使用温度に限界が生じ
るものである。(Problems to be Solved by the Invention) However, when a high electric field is applied to an insulating oil in which water-absorbed particles are dispersed, the electric fluid composition is extremely susceptible to dielectric breakdown. Since a high viscosity effect cannot be expected and the specific gravity of the dispersed particles is greater than the specific gravity of the insulating oil as the dispersion medium, it is difficult to maintain a stable and uniform dispersion state, causing sedimentation of the dispersed particles and consequently power transmission. When it is used in a clutch for use, it tends to cause a decrease in the viscous effect and a failure in the clutch piping, and the use temperature of the electrorheological fluid is limited due to the adsorption of moisture to the dispersed particles.
本発明は絶縁性油に固体粒子を混合した電気粘性流体
において、分散粒子の沈降をなくし、安定した分散状態
を保つ電気粘性流体を得ることを技術的課題とするもの
である。SUMMARY OF THE INVENTION It is a technical object of the present invention to provide an electrorheological fluid in which solid particles are mixed with an insulating oil to eliminate sedimentation of dispersed particles and obtain an electrorheological fluid which maintains a stable dispersion state.
（課題を解決するための手段） 前記技術的課題を解決するために講じた技術的手段は
次のとおりである。電気粘性効果を有する有機染料から
なる分散粒子を、該有機染料分散粒子より比重が大なる
オイルと該有機染料より比重が小なるオイルとの混合物
に分散し、前記混合物の比重が前記有機染料からなる分
散粒子の比重と同一であることを特徴とする電気粘性流
体である。(Means for Solving the Problems) The technical means taken to solve the above technical problems are as follows. Dispersion particles composed of an organic dye having an electrorheological effect are dispersed in a mixture of an oil having a higher specific gravity than the organic dye dispersed particles and an oil having a lower specific gravity than the organic dye, and the specific gravity of the mixture is determined from the organic dye. An electrorheological fluid characterized by having the same specific gravity as the dispersed particles.
（作用） 低比重であるオイルと高い比重であるオイルを分散粒
子と同じになるように混合した分散媒を用いることによ
り、分散粒子の沈降をなくし、安定した分散状態を保つ
ことができる。少量の水分を含んだ有機染料を分散粒子
とする電気粘性流体は、僅かの電流しか流さずに、粘性
流体を得ることができる。水分を含まない有機染料を分
散粒子とする電気粘性流体でも粘性効果を得ることがで
き、しかもほとんど電流が流れないといった作用をしめ
す。(Action) By using a dispersion medium in which an oil having a low specific gravity and an oil having a high specific gravity are mixed so as to be the same as the dispersed particles, sedimentation of the dispersed particles can be eliminated and a stable dispersion state can be maintained. An electrorheological fluid containing organic dyes containing a small amount of water as dispersed particles can obtain a viscous fluid with a small amount of current. The viscous effect can be obtained even with an electrorheological fluid containing an organic dye containing no water as dispersed particles, and an effect that almost no current flows is exhibited.
（実施例） 以下実施例について説明する。Example An example will be described below.
（実施例１） アゾ染料であるビスマルクブラインの粒子（粒子径10
0μｍ以下）を50〜60℃の真空中で絶縁状態にした後、
適量の水分を吸着させて含水率4.7％の分散粒子を調整
した。次にシリコーンオイル（ρ＝0.92g/ml）とフツ素
オイル（ρ＝1.87g/ml）を混合してビスマルクブラウン
と同じ比重にした分散媒を、分散濃度38VOL％になるよ
うに分散粒子に加え充分撹拌し均一な懸濁液を得た。(Example 1) Bismarck brine particles as azo dyes (particle diameter 10
0μm or less) in a vacuum at 50-60 ° C
An appropriate amount of water was adsorbed to prepare dispersed particles having a water content of 4.7%. Next, a dispersion medium mixed with silicone oil (ρ = 0.92 g / ml) and fluorine oil (ρ = 1.87 g / ml) and made to have the same specific gravity as Bismarck Brown is dispersed into particles having a dispersion concentration of 38 VOL%. The mixture was sufficiently stirred and a uniform suspension was obtained.
電気粘性効果は第１図のような同軸円筒器を使用し、
内外電極間（0.5mm）に電界を印加したときの引抜応力
（引抜速度30mm/分）の増加量で評価した。The electrorheological effect uses a coaxial cylinder as shown in Fig. 1,
Evaluation was made based on the amount of increase in the drawing stress (drawing speed 30 mm / min) when an electric field was applied between the inner and outer electrodes (0.5 mm).
含水ビスマルクブラウンの電気粘性流体における印加
電界強度と引抜応力および電流密度との関係を第２図に
示し、Ａは引抜応力と電界強度との関係を、Ｂは電流密
度と電界強度との関係を示すもので、微量の電流しか長
さずに、高い引抜応力を示した。FIG. 2 shows the relationship between the applied electric field strength, the drawing stress, and the current density in the hydrated Bismarck Brown electrorheological fluid, where A shows the relationship between the drawing stress and the electric field strength, and B shows the relationship between the current density and the electric field strength. As shown in the figure, only a small amount of current was increased, and a high drawing stress was exhibited.
第１図は前記粘性効果測定治具で、１は内側電極、２
は外側電極で、３は円筒ケース、４は内側電極保持ふた
で、５は電気粘性流体を示す。FIG. 1 shows the jig for measuring the viscous effect.
Denotes an outer electrode, 3 denotes a cylindrical case, 4 denotes an inner electrode holding lid, and 5 denotes an electrorheological fluid.
（実施例２） 実施例１と同様にして得られた絶縁状態のビスマルク
ブラウンを、実施例１と同様に比重調整した分散媒を分
散濃度38VOL％になるように分散粒子に加え、懸濁液を
得た。Example 2 Bismarck brown in an insulating state obtained in the same manner as in Example 1 was added to a dispersion medium having a specific gravity adjusted in the same manner as in Example 1 so as to have a dispersion concentration of 38 VOL%, and the suspension was added. I got
粘性効果の測定は実施例１と同じで、絶乾ビスマルク
ブラウンの電気粘性流体における印加電界と引抜応力お
よび電流密度との関係を第３図に示す。この場合ほとん
ど電流を流すことなく粘性効果を示した。The measurement of the viscous effect is the same as in Example 1. FIG. 3 shows the relationship between the applied electric field, the drawing stress, and the current density in the electro-rheological fluid of absolutely dry bismark brown. In this case, the viscous effect was exhibited with almost no current flow.
（実施例３） トリフエニルメタン染料であるクリスタルバイオレツ
トの粒子（10μｍ以下）は実施例１と同様の方法で含水
６％の含水試料を調整した。(Example 3) A 6% water-containing sample was prepared in the same manner as in Example 1 for particles (10 µm or less) of crystal violet, which is a triphenyl methane dye.
シリコーンオイルとフツ素オイルを混合し、クリスタ
ルバイオレツトと同じ比重にした分散媒を分散濃度30VO
L％になるように分散粒子に加え充分撹拌し均一な懸濁
液を得た。A silicone oil and fluorine oil are mixed, and a dispersion medium with the same specific gravity as the crystal violet is dispersed at a concentration of 30 VO.
The dispersion was added to the dispersion particles so that the concentration became L%, and the mixture was sufficiently stirred to obtain a uniform suspension.
粘性効果の測定は実施例１と同じである。含水クリス
タルバイオレツトの電気粘性流体における印加電界強度
と引抜応力および電流密度との関係を第４図に示す。ビ
スマルクブラウンと同様に、わずかの電流しか流さず
に、粘性効果を示した。The measurement of the viscous effect is the same as in Example 1. FIG. 4 shows the relationship between the applied electric field strength, the extraction stress, and the current density in the electrorheological fluid of the hydrous crystal violet. Similar to Bismarck Brown, it showed a viscous effect with little current flow.
本発明は次の効果を有する。 The present invention has the following effects.
（１） 低い比重であるシリコーンオイルと、高い比重
であるフツ素オイルを分散粒子の比重と同じになるよう
に混合した分散媒を用いることにより、分散粒子の沈降
をなくし、安定した分散状態を保つことができる。(1) By using a dispersion medium in which silicone oil having a low specific gravity and fluorine oil having a high specific gravity are mixed so as to have the same specific gravity as the dispersed particles, sedimentation of the dispersed particles is eliminated, and a stable dispersion state is obtained. Can be kept.
（２） 少量の水分を含んだ有機染料を分散粒子とする
電気粘性流体は、僅かの電流しか流さずに、粘性効果を
得ることができる。(2) An electrorheological fluid having dispersed particles of an organic dye containing a small amount of water can obtain a viscous effect with only a small current flowing.
（３） 水分を含まない有機染料の分散粒子とする電気
粘性流体でも粘性効果を得ることができ、しかもほとん
ど電流が流れない。(3) A viscous effect can be obtained even with an electrorheological fluid containing dispersed particles of an organic dye containing no water, and almost no current flows.
第１図は粘性効果測定治具の説明図、第２図は含水ビス
マルクブラウンを分散粒子とした電気粘性流体における
印加の電界強度と引抜応力及び電流密度との関係を示す
図、第３図は絶乾ビスマルクブラウンを分散粒子とする
電気粘性流体における第２図と同様の関係を示す図、第
４図は含水クリスタルバイオレツトを分散粒子とする電
気粘性流体に於ける第２図と同様の関係を示す図であ
る。 ５……電気粘性流体FIG. 1 is an explanatory diagram of a viscous effect measuring jig, FIG. 2 is a diagram showing a relationship between an applied electric field intensity, a drawing stress, and a current density in an electrorheological fluid in which hydrated Bismarck Brown is dispersed particles, and FIG. FIG. 4 shows a relationship similar to that of FIG. 2 in an electrorheological fluid having absolutely dried Bismarck Brown dispersed particles, and FIG. 4 shows a relationship similar to that of FIG. 2 in an electrorheological fluid having hydrous crystal violet as dispersed particles. FIG. 5 ... Electro-rheological fluid
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ１０Ｍ 133:12 125:14） Ｃ１０Ｎ 30:20 40:08 40:14 (56)参考文献 特開 昭63−97694（ＪＰ，Ａ) 特開 平１−96295（ＪＰ，Ａ)──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. 6 Identification number Agency reference number FI Technical indication location C10M 133: 12 125: 14) C10N 30:20 40:08 40:14 (56) References JP 63-97694 (JP, A) JP-A-1-96295 (JP, A)
Claims (3)
散粒子を、該有機染料分散粒子より比重が大なるオイル
と該有機染料より比重が小なるオイルとの混合物に分散
し、前記混合物の比重が前記有機染料からなる分散粒子
の比重と同一であることを特徴とする電気粘性流体。1. Dispersion particles of an organic dye having an electrorheological effect are dispersed in a mixture of an oil having a higher specific gravity than the organic dye dispersion particles and an oil having a lower specific gravity than the organic dye, and the specific gravity of the mixture is reduced. Is the same as the specific gravity of the dispersed particles comprising the organic dye.
イルはシリコーンオイルあるいはパラフィンオイルから
なり、前記有機染料より比重が小なるオイルはフッソオ
イルからなることを特徴とする請求項１記載の電気粘性
流体。2. The electrorheological method according to claim 1, wherein the oil having a specific gravity higher than that of the organic dye-dispersed particles comprises silicone oil or paraffin oil, and the oil having a specific gravity lower than that of the organic dye comprises fluorine oil. fluid.
る分散粒子はアゾ染料、トリフエニルメタン染料、アン
トラキノン染料、キノンイミン染料のいずれかよりなる
ことを特徴とする請求項１記載の電気粘性流体。3. The electrorheological fluid according to claim 1, wherein the dispersed particles made of an organic dye having an electrorheological effect are made of any of an azo dye, a triphenylmethane dye, an anthraquinone dye, and a quinone imine dye.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63105570A JP2699404B2 (en) | 1988-04-28 | 1988-04-28 | Electrorheological fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63105570A JP2699404B2 (en) | 1988-04-28 | 1988-04-28 | Electrorheological fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01275699A JPH01275699A (en) | 1989-11-06 |
| JP2699404B2 true JP2699404B2 (en) | 1998-01-19 |
Family
ID=14411185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63105570A Expired - Lifetime JP2699404B2 (en) | 1988-04-28 | 1988-04-28 | Electrorheological fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2699404B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5306438A (en) * | 1991-12-13 | 1994-04-26 | Lord Corporation | Ionic dye-based electrorheological materials |
| US5773782A (en) * | 1993-12-15 | 1998-06-30 | Oel-Held Gmbh | Method and apparatus for the machining of metal by spark erosion |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0737626B2 (en) * | 1986-10-14 | 1995-04-26 | 旭化成工業株式会社 | Electrorheological fluid |
-
1988
- 1988-04-28 JP JP63105570A patent/JP2699404B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01275699A (en) | 1989-11-06 |
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