JPH11513192A - 磁気レオロジー流体装置の出力増加法及び磁気レオロジー流体組成物 - Google Patents
磁気レオロジー流体装置の出力増加法及び磁気レオロジー流体組成物Info
- Publication number
- JPH11513192A JPH11513192A JP9506075A JP50607597A JPH11513192A JP H11513192 A JPH11513192 A JP H11513192A JP 9506075 A JP9506075 A JP 9506075A JP 50607597 A JP50607597 A JP 50607597A JP H11513192 A JPH11513192 A JP H11513192A
- Authority
- JP
- Japan
- Prior art keywords
- fluid
- particle
- component
- magnetorheological fluid
- magnetorheological
- 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.)
- Granted
Links
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
- H01F1/447—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids characterised by magnetoviscosity, e.g. magnetorheological, magnetothixotropic, magnetodilatant liquids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/14—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by using rotary bodies, e.g. vane
- G01N11/142—Sample held between two members substantially perpendicular to axis of rotation, e.g. parallel plate viscometer
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Lubricants (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. 磁化性粒子成分及びキャリヤー成分から成り、該磁化性粒子成分が磁気レ オロジー流体に配合される前に少なくとも0.50の分数充てん密度を有するこ とを特徴とする磁気レオロジー流体。 2. 前記キャリヤー成分が1〜250センチポアズの粘度を有することを特徴 とする請求項1記載の磁気レオロジー流体。 3. 前記キャリヤー成分が50センチポアズ以下の粘度を有することを特徴と する請求項2記載の磁気レオロジー流体。 4. 前記キャリヤー成分は、前記磁気レオロジー流体の50〜95体積%の量 で存在し、前記粒子成分は前記磁気レオロジー流体の5〜50体積%の量で存在 することを特徴とする請求項1記載の磁気レオロジー流体。 5. 前記キャリヤー成分は、天然脂肪油、鉱物油、ポリエチレン、二塩基酸エ ステル、ネオペンチルポリオールエステル、リン酸エステル、合成シクロパラフ ィン、合成パラフィン、不飽和炭化水素油、一塩基酸エステル、グリコールエス テル及びエーテル、フッ素化エステル及びエーテル、ケイ酸エステル、シリコー ン油、シリコーン共重合体、合成炭化水素、過フッ素化ポリエーテル及びエステ ル、ハロゲン化炭化水素、及びそれらの混合体及び誘導体から成る群から選択す ることを特徴とする請求項2記載の磁気レオロジー流体。 6. 前記キャリヤー成分は、水、グリコール、エステル及びそれらの混合体及 び誘導体から成る群から選択することを特徴とする請求項2記載の磁気レオロジ ー流体。 7. 前記キャリヤー成分は、さらに分散剤から成ることを特徴とする請求項1 記載の磁気レオロジー流体。 8. 前記粒子成分は、鉄、鉄合金、酸化鉄、窒化鉄、炭化鉄、カルボニル鉄、 二酸化クロム、低炭素鋼、ケイ素鋼、ニッケル、コバルト、及びそれらの混合物 から成る群から選択することを特徴とする請求項1記載の磁気レオロジー流体。 9. 前記粒子成分は、鉄、酸化鉄、鉄−ニッケル合金、鉄−コバルト合金、及 びそれらの混合物から成ることを特徴とする請求項8記載の磁気レオロジー流体 。 10. 前記粒子成分は、平均直径が0.1〜500μmの微粉砕固体から成る ことを特徴とする請求項1記載の磁気レオロジー流体。 11. 前記粒子成分は、平均粒子直径をもつ少なくとも第1の粒子グループと 、平均粒子直径をもつ第2の粒子グループの混合体であり、第1の粒子グループ の平均直径が第2の粒子グループの平均直径と異なることを特徴とする請求項1 記載の磁気レオロジー流体。 12. 前記第1の粒子グループ及び第2の粒子グループの各々が、前記磁気レ オロジー流体への配合前に0.5以下の分数充てん密度を有することを特徴とす る請求項11記載の磁気レオロジー流体。 13. 前記混合体がカルボニル鉄粒子を含むことを特徴とする請求項12記載 の磁気レオロジー流体。 14. 前記混合体は、粒子成分の前重量を基準にして40〜60重量%の前記 第1の粒子グループと、60〜40重量%の前記第2の粒子グループから成るこ とを特徴とする請求項11記載の磁気レオロジー流体。 15. 前記第1の粒子グループの平均粒子直径が、前記第2の粒子グループの 平均直径より3〜15倍大きいことを特徴とする請求項11記載の磁気レオロジ ー流体。 16.前記第1の粒子グループの平均粒子直径及び前記第2の粒子グループの平 均直径が0.1〜1500μmであることを特徴とする請求項15記載の磁気レ オロジー流体。 17.次の工程(a)及び工程(b)から成ることを特徴とする磁気レオロジー 流体装置の力出力増加法: (a) 磁気レオロジー流体の第1の部分を前記磁気レオロジー流体装置の 作動間隙に配置する工程、前記磁気レオロジー流体は磁化性粒子成分及びキャリ ヤー成分から成り、該磁化性粒子成分が磁気レオロジー流体に配合される前に少 なくとも0.50の分数充てん密度を有する;及び (b) 前記磁気レオロジー流体の第2の部分を前記作動間隙の外に前記磁 気レオロジー流体の第1の部分と流体接続させて配置して、外部磁界が磁気レオ ロジー流体の第1の部分に印加されたとき、該第1の部分における前記粒子成分 の体積%が第2の部分における前記粒子成分の体積%に対して増加させる工程。 18. 前記キャリヤー成分が1〜250センチポアズの粘度を有することを特 徴とする請求項17記載の方法。 19. 前記第1の部分における前記粒子成分の体積%は、該第1の部分に磁界 が印加されたとき前記第2の部分における前記粒子成分の体積%より大であるこ とを特徴とする請求項17記載の方法。 20. 前記第1の部分における粒子体積%は、該第1の部分に磁界が印加され たときに前記磁気サレオロジー流体の静的全粒子体積%より大であることを特徴 とする請求項17記載の方法。 21. 前記粒子成分は、鉄、鉄合金、酸化鉄、窒化鉄、炭化鉄、カルボニル鉄 、二酸化クロム、低炭素鋼、ケイ素鋼、ニッケル、及びコバルトから成る群から 選択することを特徴とする請求項17記載の方法。 22. 前記粒子成分は、平均粒子直径をもつ少なくとも第1の粒子グループと 、平均粒子直径をもつ第2の粒子グループの混合体であり、第1の粒子グループ の平均直径が第2の粒子グループの平均直径と異なることを特徴とする請求項1 7記載の方法。 23. 前記粒子成分は、平均直径が0.1〜500μmの微粉砕固体から成る ことを特徴とする請求項17記載の方法。 24.磁気サレオロジー流体を含有する流体収納区画と、磁界発生用第1及び第 2手段と、該、第1及び第2手段の間の作動間隙を備え、前記磁気レオロジー流 体が磁化性粒子成分及びキャリヤー成分から成り、該磁化性粒子成分が磁気レオ ロジー流体に配合する前に少なくとも0.50の分数充てん密度を有することを 特徴とする磁気レオロジー流体装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/544,526 US5900184A (en) | 1995-10-18 | 1995-10-18 | Method and magnetorheological fluid formulations for increasing the output of a magnetorheological fluid device |
US544,526 | 1995-10-18 | ||
US08/544,526 | 1995-10-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11513192A true JPH11513192A (ja) | 1999-11-09 |
JP3280032B2 JP3280032B2 (ja) | 2002-04-30 |
Family
ID=24172536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50607597A Expired - Lifetime JP3280032B2 (ja) | 1995-10-18 | 1996-10-02 | 磁気レオロジー流体装置の出力増加法及び磁気レオロジー流体組成物 |
Country Status (6)
Country | Link |
---|---|
US (2) | US5900184A (ja) |
EP (1) | EP0856190B1 (ja) |
JP (1) | JP3280032B2 (ja) |
CA (1) | CA2232192A1 (ja) |
DE (1) | DE69619538T2 (ja) |
WO (1) | WO1997015058A1 (ja) |
Cited By (11)
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JP2012094677A (ja) * | 2010-10-27 | 2012-05-17 | Kyodo Yushi Co Ltd | 磁気粘性流体組成物 |
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WO2012120842A1 (ja) * | 2011-03-08 | 2012-09-13 | 株式会社栗本鐵工所 | 磁気粘性流体及びこれを用いたクラッチ |
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JP2014229625A (ja) * | 2013-05-17 | 2014-12-08 | 国立大学法人 名古屋工業大学 | 磁気機能性流体およびそれを用いたダンパ、クラッチ |
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Also Published As
Publication number | Publication date |
---|---|
US5900184A (en) | 1999-05-04 |
EP0856190B1 (en) | 2002-02-27 |
WO1997015058A1 (en) | 1997-04-24 |
JP3280032B2 (ja) | 2002-04-30 |
DE69619538D1 (de) | 2002-04-04 |
US6027664A (en) | 2000-02-22 |
CA2232192A1 (en) | 1997-04-24 |
DE69619538T2 (de) | 2002-08-08 |
EP0856190A1 (en) | 1998-08-05 |
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