Study on Micro Flow Behavior and Applications to Micro Systems of Electrorheological Fluids

电流变流体微流动行为及其在微系统中的应用研究

• 批准号: 11450097
• 负责人: NAKANO Masami
• 金额: $ 8.83万
• 依托单位: Yamagata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450097/
• 关键词: Electrorheological Fluid; Micro System; Flow mode; Micro Flow Behavior; Flow Rate Control Characteristics; 3-Ports Micro Valve; Micro Actuator; Piezoelectric Micro Pump; 分散系ER流体; 回転せん断流れ; スクイーズ流れ; マイクロ流動; ERマイクロアクチュエータ; PWM制御; ER圧電マイクロポンプ

ER fluids are one of an exciting family of functional fluids, which show dramatic and reversible rheplogical changes in several milliseconds when the electric field is applied. Therefore, for example, in the ER fluid hydraulic circuit systems, it is possible to control the pressure and flow rate using an ER valve consisting of only electrodes with no moving parts. In this research, featuring the possibility of miniaturization of ER mechanical elements such as clutch, brake, damper and valve due to their construction using only electrodes, the following investigations have been done in order to develop micro systems utilizing electrorheological fluids as working oils.(1) The flow fields frequently used in the ER micro systems are classified into three flow modes such as a pressure flow, a shear flow and a squeeze flow. For three kinds of ER fluids, the micro flow characteristic in these three flow modes with an about 0.1-0.3mm micro gap was clarified by flow visualization observation in … More close relation to each ER characteristic, and the ER fluid suitable for the ER micro system and the optimal design concept for applications were shown.(2) As some examples of micro systems, the 3-ports micro ER valve and the micro-actuator consisting of two ER valves and a diaphragm drive part were fabricated by the photolithography method. The flow rate control characteristics for the 3-ports micro ER valve and the diaphragm response characteristics for the micro-actuator in open loop control and PID position feedback control were evaluated.(3) A piezoelectric micro pump for ER fluids actuated by a piece of PVDF piezdelectric-film diaphragm for supplying ER fluid to the above micro-actuator was developed. A normalized method for evaluating the behaviors of a circular unimorph piezoelectric diaphragm was deduced and the diaphragm deformation for the input voltage and the pumping flow rate were analyzed, and the piezoelectric diaphragm pump of 10mm diameter was actually constructed, and the pumping performance was evaluated. Less

内质网流体是一种令人兴奋的功能流体，当施加电场时，它在几毫秒内表现出戏剧性和可逆的流变变化。因此，例如，在电流变压流体液压回路系统中，可以使用仅由电极组成的电流变压阀来控制压力和流量，而不需要移动部件。在本研究中，由于仅使用电极结构，离合器、制动器、减振器和阀门等ER机械元件有可能小型化，为了开发利用电流变流体作为工作油的微系统，我们进行了以下研究。(1)内质网微系统中常用的流场分为压力流、剪切流和挤压流三种流动模式。通过流动可视化观察，明确了三种电流变流体在微间隙约为0.1 ~ 0.3mm的三种流动模式下的微流动特性，并与各种电流变特性建立了更紧密的联系，给出了适合电流变微系统的电流变流体及其应用的优化设计理念。(2)以微系统为例，采用光刻法制备了由两个ER阀和一个膜片驱动部件组成的3端口微型ER阀和微致动器。研究了3端口微型ER阀在开环控制和PID位置反馈控制下的流量控制特性和微执行器的膜片响应特性。(3)研制了一种由PVDF压电膜膜片驱动的电流变流体压电微泵，该压电膜膜片为上述微驱动器提供电流变流体。推导了圆形均匀压电膜片性能的归一化评价方法，分析了膜片在输入电压和泵送流量下的变形，并实际构建了直径为10mm的压电膜片泵，对其泵送性能进行了评价。少

项目成果

M.Nakano: "Dynamic viscoelasticity in oscillatory slit flow of an ER suspension containing sulfonated polymer particles"International Journal of Modern Physics B. Vol.13. 1870-1877 (1999)

M.Nakano：“含有磺化聚合物颗粒的 ER 悬浮液振荡狭缝流中的动态粘弹性”国际现代物理学杂志 B. 第 13 卷。

K.Matsushita: "Characterization of Pure Water Treated GaAs Surfaces by Measuring Contact Angles of Water Droplets"Journal of Electrochemical Society. Vol.148. G401-G405 (2001)

K.Matsushita：“通过测量水滴接触角来表征纯水处理的砷化镓表面”电化学学会杂志。

R. Aizawa: "Hysteresis phenomenon in flow-curves of ER fluids containing sulfonated polymer particles"Int. J. of Modern Physics B. 15-6&7. 1070-1077 (2001)

R. Aizawa：“含有磺化聚合物颗粒的电流变流体的流动曲线中的滞后现象”Int。

H. Nishiyama: "Numerical simulation of MR fluids damping characteristics using modified Bingham model"Int. J. of Modern Physics B. (in press). (2002)

H. Nishiyama：“使用修正宾厄姆模型对 MR 流体阻尼特性进行数值模拟”Int。

中野政身: "分散系ER流体のスクイーズ流れモードにおけるER効果とマイクロ流動特性"JSME第79期流体工学部門講演会CD-ROM版講演論文集. No.01-3・論文No.512. 1-4 (2001)

中野雅美：《分散ER流体挤压流动模式下的ER效应和微流体特性》JSME第79期流体工程系讲座CD-ROM版论文集第01-3号，论文第512. 1 -4号（2001年）。