JP2021191812A - 電気粘性流体およびシリンダ装置 - Google Patents
電気粘性流体およびシリンダ装置 Download PDFInfo
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- JP2021191812A JP2021191812A JP2020098440A JP2020098440A JP2021191812A JP 2021191812 A JP2021191812 A JP 2021191812A JP 2020098440 A JP2020098440 A JP 2020098440A JP 2020098440 A JP2020098440 A JP 2020098440A JP 2021191812 A JP2021191812 A JP 2021191812A
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- erf
- polyol
- electrorheological fluid
- polyurethane
- fluid according
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Images
Classifications
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0838—Manufacture of polymers in the presence of non-reactive compounds
- C08G18/0842—Manufacture of polymers in the presence of non-reactive compounds in the presence of liquid diluents
- C08G18/0861—Manufacture of polymers in the presence of non-reactive compounds in the presence of liquid diluents in the presence of a dispersing phase for the polymers or a phase dispersed in the polymers
- C08G18/0871—Manufacture of polymers in the presence of non-reactive compounds in the presence of liquid diluents in the presence of a dispersing phase for the polymers or a phase dispersed in the polymers the dispersing or dispersed phase being organic
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- 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
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- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
- F16F2224/043—Fluids electrorheological
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- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
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- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
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- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
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- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
- F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
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Abstract
Description
図1は本発明の電気粘性流体の一例を示す模式図である。図1に示すように、本発明の電気粘性流体(以下、「ERF」と称する。)300は、流体30と、金属イオンを含むポリウレタン粒子31とを含む。流体30は、絶縁性を有する媒体(ベースオイル)からなる分散媒であり、ポリウレタン粒子31はこのベースオイルに分散した分散相である。すなわち、ポリウレタン粒子31がベースオイルに分散した懸濁液がERFである。金属イオンを含むポリウレタン粒子31は、電圧の印加により、電極間に粒子の構造体を作ることで、流体の粘度を上昇されるER効果を発現する物質である。内部に含む金属イオンの有無および種類によって、ER効果が異なる。
次に、本発明のシリンダ装置について説明する。図6は本発明のシリンダ装置の一例を示す縦断面模式図である。シリンダ装置1は、通常、車両の各車輪に対応して一つずつ設けられており、車両のボディ−車軸間の衝撃・振動を緩和する。図1に示すシリンダ装置1は、ロッド6の一端に設けられたヘッドが車両(図示せず)のボディ側に固定され、他端がベースシェル2に挿入されて車軸側に固定される。ベースシェル2は、シリンダ装置1の外郭を構成する円筒状の部材であり、内部に前述した本発明のERF8が封入されている。
実施例1のERFの作製方法について以下に記載する。
実施例4は、実施例1の1,4−BDに代えて1,5−ペンタンジオールを添加し、水酸基等量が同等になるにように配合量を変更したこと以外は実施例1と同様にしてERFを作製した。実施例4の鎖延長剤と配合率を表1に併記する。
実施例10は、実施例2の硬化剤量を変更したこと以外は、実施例2と同様にしてERFを作製した。実施例10、11の鎖延長剤と配合率を表1に併記する。
鎖延長剤を添加しなかったこと以外は実施例1と同様にして比較例のERFを作製した。比較例のERFの構成を後述する表1に併記する。
実施例1〜9および比較例の電気粘性効果(ER効果)、ガラス転移点の評価について、以下の条件で実施した。作製した実施例1〜9および比較例の各試料におけるガラス転移点(Tg)を、示差走査熱量測定(Differential scanning calorimetry:DSC)を用いて測定した。測定試料として、各実施例および比較例のERFを液体のまま用いた。測定したガラス転移点を、後述する表1に記載する。
Claims (9)
- 流体と、金属イオンを含むポリウレタン粒子と、を含み、
前記ポリウレタン粒子は、ハードセグメントおよびソフトセグメントの相分離構造を有し、前記ハードセグメントを形成するウレタン結合を増大する添加剤を含むことを特徴とする電気粘性流体。 - 前記添加剤は、前記ハードセグメントを構成するポリウレタン鎖を形成する鎖延長剤であることを特徴とする請求項1に記載の電気粘性流体。
- 前記鎖延長剤は、単分子で構成される多官能アルコールまたは多官能アミンであることを特徴とする請求項2に記載の電気粘性流体。
- 前記ポリウレタン粒子はイソシアネートおよび繰り返し単位の炭素数が3以下の高分子であるポリオールから構成され、
前記多官能アルコールまたは前記多官能アミンの前記ポリオールの水酸基に対する水酸基またはアミノ基の等量比:鎖延長剤の水酸基の物質量/ポリオールの水酸基またはアミノ基の物質量が0.11以上であることを特徴とする請求項3に記載の電気粘性流体。 - 前記多官能アルコールまたは前記多官能アミンには、少なくとも脂肪族系のジオールまたはジアミンが含まれることを特徴とする請求項3または請求項4に記載の電気粘性流体。
- 前記ジオールまたは前記ジアミンの炭素数が偶数であることを特徴とする請求項5に記載の電気粘性流体。
- 前記ジオールは、1,4−ブタンジオールまたは1,6−ヘキサンジオールであることを特徴とする請求項5または6に記載の電気粘性流体。
- 前記ポリオールが、ヒドロキシル基を3つ有する3官能のポリオールを構成成分として含み、前記ポリウレタン粒子が熱による架橋が生じる熱硬化性樹脂であることを特徴とする請求項4から請求項7のいずれか1項に記載の電気粘性流体。
- ピストンロッドと、前記ピストンロッドが挿入される内筒と、前記ピストンロッドと前記内筒との間に設けられた電気粘性流体と、を備え、
前記電気粘性流体が、請求項1から8のいずれか1項に記載の電気粘性流体であることを特徴とするシリンダ装置。
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JP2020098440A JP2021191812A (ja) | 2020-06-05 | 2020-06-05 | 電気粘性流体およびシリンダ装置 |
KR1020227039382A KR20220163482A (ko) | 2020-06-05 | 2021-05-06 | 전기 점성 유체 및 실린더 장치 |
PCT/JP2021/017373 WO2021246099A1 (ja) | 2020-06-05 | 2021-05-06 | 電気粘性流体およびシリンダ装置 |
CN202180034942.XA CN115605565B (zh) | 2020-06-05 | 2021-05-06 | 电粘性流体和缸体装置 |
US17/919,765 US20230159847A1 (en) | 2020-06-05 | 2021-05-06 | Electroviscous fluid and cylinder device |
DE112021001651.2T DE112021001651T5 (de) | 2020-06-05 | 2021-05-06 | Elektroviskose Flüssigkeit und Zylindervorrichtung |
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JPH0873877A (ja) * | 1994-09-08 | 1996-03-19 | Asahi Chem Ind Co Ltd | 均一系電気粘性流体 |
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