In order to meet the needs of transporting cells and macromolecules in such areas as medical mechanism

sanitation and health care

a new type of piezoelectric pump

the Valveless Piezoelectric Pump with Y-shape Tubes(VPPYT)

is presented and its vibration and pump flow rate are analyzed. The structures and characteristics of VPPYT and its tubes are introduced firstly. Then

based on the bending vibration theory of thin circular board

the vibration of the piezoelectric actuator is analyzed theoretically. After that

through analyzing the fluid state in VPPYT and its tubes

the equation for the calculation the pump flow rate is established. Finally

Finite Element Method (FEM) is employed to simulate the flow state in the Y-shape tubes to obtain the flow resistances and pressure variation rules along the positive and negative directions

respectively. The experimental results show that the theoretical and experimental pump flow rates follow the same variation trend

and the minimum relative error between the two results is 12%. Thus the validity and correctness of the theoretical analysis and the numerical simulation are proved.