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气泡的存在使无阀微泵的工作性能和使用寿命大大降低,甚至无法正常工作.为了合理地预测无阀微泵腔内气泡对周期驱动压力的影响,给出了用来描述收缩管/扩张管型无阀压电微泵的数学模型,包括泵腔体积变化、连续性方程、流体有效体积弹性模量以及锥管阻力系数的计算.同时,分析了腔内不同气泡体积对无阀微泵周期驱动压力的影响,并对两个气泡进入无阀微泵泵腔时压力脉动过程进行了仿真和试验研究.通过仿真结果与试验数据的比较表明,所提出的存在气泡时无阀微泵数学模型及仿真方法是合理的.
The existence of bubbles makes the working performance and service life of the valveless micro-pump greatly reduced, and can not even work normally.In order to reasonably predict the influence of bubble on the cycle-driven pressure in the valveless micro-pump chamber, The mathematical model of the valveless piezoelectric micro-pump includes the cavity volume change, the continuity equation, the effective volume modulus of the fluid, and the calculation of the cone resistance coefficient.At the same time, Cycle-driven pressure and simulate and test the pressure pulsation process of the two bubbles into the valveless micro-pump chamber.The comparison of the simulation results with the experimental data shows that the proposed valveless micro-pump math Model and simulation method is reasonable.