Study on Electro-Hydro-Dynamical(EHD) Pump Utilizing Gradient Force of Electric Field Intensity

由几个微米环形电极和几个微米圆盘电极组成的泵内的流动很难形成，因为圆盘电极阻止了几个微米通道内的电液动力(EHD)泵流动。为此，采用直径为100 mm的圆环电极和圆盘电极组成的泵进行实验。在环形和圆盘电极沿水平方向平行布置的水平传输泵中，液体是在铜制圆盘的氧化物下，从具有弱场的圆盘向具有强场的环形电极泵送的，因此电致伸缩力是关键的泵送力，明显地作用于液体。通过数值计算，得到了在由圆环电极和圆盘电极组成的EHD泵的环电极上施加10KV电压时的电场梯度力矢量。…表面附近的电场梯度力较强更多的是圆盘侧面的环。由此可见，在圆盘侧面的环表面附近速度较快。EHD泵流在电压后134毫秒形成。在圆盘研磨后，随着外加电压的变化，工作液如HCFC-R123从阴极流向阳极。在这种情况下，泵浦作用力似乎主要由强电场作用下的离解离子与非均匀电场相互作用产生的库仑力构成。在EHD微泵之前开发的由几个毫米环电极和几个毫米环电极组成的血管内EHD泵中，在没有电晕放电的情况下，液体从阴极流向阳极，与外加电压的极性无关。这一结果表明，强电场作用下液体中解离产生的库仑力是关键的泵浦作用力。以不同形状和尺寸的电极为研究对象，研究了电极结构与泵压力之间的关系。较少

Formation of flow in pump consisting of several micrometer ring electrode and several micrometer disk electrode was difficult because the disk electrode prevented electro-hydro-dynamical(EHD) pump flow within several micrometer channel. So that, the pump consisting of tens of millimeter ring electrode and disk electrode of diameter of 100mm was used for experiment. In a horizontally transmission pump in which ring and disk electrodes are arranged in a parallel in the horizontally direction, liquid was pumped from the disk with a week field to the ring electrodes with a strong field under an oxide of the disk made of copper, so the electrostriction force is the pivotal pumping force and apparently acts on the liquid. The vectors of gradient force of electric field in case of applying voltage of 10kV at the ring electrode of EHD pump composed of the ring electrode and the disk electrode were obtained by numerical calculation. The gradient force of electric field is strong near surface of … More the ring of side of the disk. So that, it appers that the velocity is fast near surface of the ring of side of the disk. EHD pump flow was formed at 134 msec after the voltage. After the disk was grinded, the working fluid such as HCFC-R123 flowed from the cathode to the anode under the change of the polarity of the applied voltage. In this case, the pumping force seems to consist mainly of Coulomb force by interaction between the dissociation ions of HCFC-123 under the strong electric field intensity and the nonuniform electric field. In an intravascular EHD pump consisting of several millimeter ring electrode and several millimeter ring electrode arranged in insulating narrow tube, which was developed prior to an EHD micropump, liquid flowed from the cathode to anode regardless of the polarity of the applied voltage in the absence of the corona discharge. This result indicates that the Coulomb force generated by dissociation in liquid due to strong electric field is the pivotal pumping force. The correlation between the electrode configuration and the pumping force was studied by using various shapes and sizes of electrodes for EHD pumps. Less