利用压电驱动的半球缺群无阀泵试验及其混合泵送性能分析  

Tests for a valve-less pump with hemisphere-segment group driven by a piezoelectric vibrator and its performance analysis

作　　者：胡彩旗[1] 吴殿亮 纪晶[1] 胡笑奇[2] 

机构地区：[1]青岛农业大学机电工程学院,山东青岛266109 [2]丽水学院工程与设计学院,浙江丽水323000

出　　处：《振动与冲击》2016年第5期131-139,185,共10页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51375227;51475221);浙江省自然基金资助项目(LY13E050015);青岛农业大学名校工程资助项目

摘　　要：为满足微流量、小流量压电液体混合与输送方面的要求,提出了一种集流体混合与泵送为一体的半球缺群无阀泵,该泵利用半球缺的圆面与球面对流体的阻力不等,配合压电振子的往复振动实现对流体的泵送;同时,利用半球缺群对流体的遮挡、干扰效应产生的湍流和旋涡实现对流体的高效混合。在解析泵的工作原理、振子振动特性、泵理论流量基础上,进行了流量与电压、频率及行数、列数变化的半球缺群的关系试验,获得了泵系统的低频谐振频率为6 Hz,并在电压及频率为160 V、6 Hz时,半球缺群4×3得到了53.2 m L/min的泵流量,电压及频率为180 V、6 Hz时,半球缺群3×3得到了59.4 m L/min的泵流量;对半球缺群行数、列数及间距变化对混合效果的影响进行了仿真研究和试验验证,得到了增加行数、列数及间距均能提高不同液体间混合效果的结论,试验及仿真分析的结果验证了半球缺群无阀泵能够较好地实现对流体的混合与泵送。In order to meet requirements of micro flow or small flow piezoelectric fluid mixing and conveying,a valve-less pump with hemisphere-segment group integrating fluid mixing and conveying was proposed. In the pump,the resistances of fluid flow on spherical surface and semi-circular flat surface of hemisphere-segment were unequal. Through vibration of a piezoelectric vibrator,fluid was conveyed in one-way. Meanwhile,adopting hemisphere-segments＇ covering and interfering fluids to cause turbulences and vortexes,fluids were mixed effectively. The working principle of the pump,the vibration characteristics of the piezoelectric vibrator,and the theoretical flow rate of the pump were analyzed. Then,the relationships of flow rate and voltage,vibrator frequency,and different rows and columns of hemisphere-segment group were tested. It was shown that the resonance frequency of the pump system is 6 Hz; with the driving voltage of 160 V,the driving frequency of 6 Hz and the hemisphere-segment array group 4 × 3,the pump flow rate reaches 53. 2 m L / min; with the driving voltage of 180 V,the driving frequency of 6 Hz and the hemisphere-segment array group 3 × 3,the pump flow rate reaches 59. 4 m L / min. Finally,the influences of different rows and columns,spacing and number of hemispheresegment group on fluid mixture effect were simulated and tested. The results showed that increasing rows,columns,spacing and numbers can improve the mixture effect of different fluids. The tests and simulations verified that the valveless pump with hemisphere-segment group can realize mixing and conveying fluids.

关 键 词：压电振子 半球缺群 无阀泵 流体 混合 输送 

分 类 号：TH35[机械工程—机械制造及自动化] TH38