大振子压电泵模拟血液泵送研究

Simulated Hematological Pumping System Research on Piezoelectric Pumps Driven by Large Vibrator

设计了一种单腔大振子被动阀压电泵,压电振子直径为70 mm,厚度0.6 mm,采用伞形橡胶阀厚度为0.3 mm,直径为10 mm。在理论分析的基础上,验证了结构输出流量的合理性。利用浓度90%的甘油水溶液模拟黏度234.6 mPa·s血液介质,测试了不同工作频率下单腔大振子压电泵输出流量及压力。试验结果表明:在输入电压为110 V正弦交流电压,当电源信号频率为210 Hz时,得到流量最大值为412.5 mL/min,在当电源信号频率为110 Hz时,得到压力最大值为1.729×104Pa。试验结果为单腔大振子压电泵血液输送研究提供了参考。

A style of the piezoelectric pumps driven by single lumen large vibrators passive valve is designed. Among them, the diameter of the piezoelectric vibrator was 70 mm, the thickness of 0. 6 mm, and the umbrella the thickness of the rubber valve was 0. 3 mm, and 10 mm in diameter, on the basis of theoretical analysis, the rationality of the piezoelectric pump output flow was validated. Concentration of 90% glycerol water solution was used in simulation for 234. 6 mPa · s blood viscosity medium, and the output flow and pressure of the piezoelectric pumps driven by single lumen large vibrators under different working frequencies were tested. The experi- mental results show that in the input voltage is 110 V sine alternating current （AC） voltage, power signal frequency is 210 Hz, the maximum flow rate of 412. 5 mL/min, the power signal frequency is 110 Hz, maximum pressure of 1. 729× 10^4 Pa is obtained. Test re- suits provide the reference for research of the piezoelectric pumps driven by single lumen large vibrators.