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

电流变液是一类激动人心的功能流体，当施加电场时，电流变液在几毫秒内表现出显著的可逆流变变化。因此，例如，在ER流体液压回路系统中，可以使用仅由电极组成而没有移动部件的ER阀来控制压力和流量。在这项研究中，具有小型化的电流变机械元件，如离合器，制动器，阻尼器和阀门，由于他们的结构只使用电极的可能性，已经做了以下研究，以开发利用电流变液作为工作油的微系统。(1)电流变微系统中经常使用的流场分为三种流动模式，如压力流、剪切流和挤压流。对三种电流变液进行了流动可视化观察，研究了电流变液在这三种流动模式下的微流动特性，微间隙约为0.1-0.3mm， ...更多信息 与各电流变特性密切相关，提出了适合于电流变微系统的电流变流体及应用的优化设计概念。(2)作为微系统的一些示例，通过光刻方法制作了三端口微型电流变阀和由两个电流变阀和隔膜驱动部分组成的微致动器。研究了三通微电流变阀的流量控制特性和微执行器在开环控制和PID位置反馈控制下的膜片响应特性。(3)研制了一种以PVDF压电薄膜膜片为驱动元件的电流变液压电微泵。推导了一种评价圆形单压电晶片压电膜片性能的归一化方法，分析了膜片随输入电压和泵送流量的变形情况，并实际制作了直径为10 mm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）。