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微型泵在化学分析、环境监测和药物传送等领域有广阔应用前景。为了解热驱动薄膜式微型泵的性能 ,对泵的主要部件进行了理论分析 ,然后对泵的整体性能进行了数值模拟。得到了微型泵的频率特性 ,流量 -压头曲线及流量随功率的变化。发现泵的流量在 3 .3 3 Hz左右达到最大 ,泵的零流量压头为 64 k Pa左右 ;由于预应力的作用 ,使输入功率低时泵的流量比没有预应力时显著减小 ,而当输入功率较大时 ,泵的流量随输入功率增大而迅速增大。实验测定了微型泵流量的频率特性和随功率的变化 ,实测结果与模拟结果基本吻合
Micropumps have broad application prospects in the fields of chemical analysis, environmental monitoring and drug delivery. In order to understand the performance of the heat-driven membrane micro-pump, the main components of the pump were theoretically analyzed, and then the overall performance of the pump was numerically simulated. The frequency characteristics of micro-pump, the flow-pressure curve and the change of flow rate with power were obtained. It is found that the pump flow reaches the maximum around 3.3 Hz, and the pump zero flow head pressure is about 64 kPa. Due to the effect of prestressing, the pump flow rate decreases significantly when the input power is lower than without prestressing. When the input power is larger, the pump flow rate increases rapidly with the input power. Experiments measured the frequency characteristics of micro-pump flow and changes with the power, the measured results are basically consistent with the simulation results