仿鱼摆动式无阀压电泵的新进展

New Development of Valve-Less Piezoelectric Pump Imitating Caudal-Fin

近年来,随着医疗、卫生和保健领域的发展,对压电泵、特别是无阀压电泵的微型化、传输流体的稳定性、流动脉动及回流等方面提出了更高的要求。容积型压电泵因其固有的周期性、波动性而不能产生连续输出和压力,同时回流、脉动现象或微型阀片阻塞现象无法避免;回转型压电泵因其固有的复杂性和难控性无法满足体内输送的安全及稳定的需要。因此,探索新型工作原理的压电泵尤为重要。基于摆动驱动形成流体单向流动的现象,综述了南京航空航天大学机械结构力学及控制国家重点实验室流体驱动研究小组近年来对3种非容积型、非回转型的仿鱼尾摆动式无阀压电泵研究成果。

With continual developments in medicine and health care,parts such as microminiaturization,stability of transferring fluid,and flow pulsation and backflow for piezoelectric pumps,especially valveless piezoelectric pumps,have increased their requirements in recent years.Volume piezoelectric pumps cannot generate continuous output and pressure due to their inherent period and fluctuation,nor can they avoid the phenomena of backflow,pulsation and choking of the micro valve block.Meanwhile,rotation piezoelectric pumps cannot meet the requirements of security transport and stabilization in vivo due to their own complexity and uncontrollability.As a result,the exploration of novel operating principles of piezoelectric pumps becomes particularly important.Based on the phenomenon of driving fluid with single-flow by swing,this paper summarizes the research on three kinds of caudal-fin-type swing type valve-less piezoelectric pumps,which are developed in the fluid driving unit of the State Key Laboratory of Mechanics and Control of Mechanical Structures in Nanjing University of Aeronautics and Astronautics.