电流体动力学静音泵制备及性能研究

Preparation and Performance of Electro Hydro Dynamic Mute Pump

为实现快速、精确和智能主动控制,课题组设计制备了一种电流体动力学(electro hydro dynamics,EHD)静音泵。该种泵是基于电场与介电液直接相互作用的一类非机械泵,采用三明治结构,上、下2层电极完全对称,呈梳齿状排布;中间为宽度2 mm,高1 mm的通道层。通道层中充满了介电液,在高强度电场下介电液中杂质或弱电解质的解离产生自由电荷,致使介电液产生流动。为了对电流体静音泵驱动力的影响因素有更深入的了解,课题组用液位差表征静音泵的驱动力,通过控制变量法分析了不同电极间距、不同电极宽度和不同电极对间距对静音泵驱动力的影响。结果表明:不同电极宽度的变化对驱动力影响较小;在发生击穿前的同等电压下,电极间距越小,驱动力越大;而在发生击穿前的同等电压下,电极对间距在大于4 mm后,驱动力变化不大。

In order to realize fast,accurate and intelligent active control,an electro hydro dynamics(EHD)mute pump was designed and prepared.This kind of pump is a kind of non-mechanical pump based on the direct interaction between electric field and dielectro-hydraulic.It adopted a sandwich structure.The upper and lower electrodes were completely symmetrical and arranged in a comb-tooth shape.The middle was a channel layer with a width of 2 mm and a height of 1 mm,which was filled with dielectro-hydraulic.Under the high-intensity electric field,the dissociation of impurities or weak electrolytes in dielectro-hydraulic generated free charge,resulting in the flow of dielectro-hydraulic.In order to have a deeper understanding of the influencing factors of the driving force of the electro hydro dynamic mute pump,the liquid level difference to characterize the driving force of the mute pump was used.The influence of different electrode spacing,different electrode width and different electrode pair spacing on the driving force of the mute pump was analyzed by the control variable method.The results show that different electrode widths have little effect on the driving force;under the same voltage before the breakdown,the smaller the electrode spacing,the greater the driving force;under the same voltage before breakdown,the driving force does not change much after the electrode pair spacing is greater than 4 mm.