Performance analysis of a combined rhinoceros horn and V-channel valveless piezoelectric pump

With the development of precision miniaturization of fluid transfer devices, high transfer performance and miniaturization for fluid transfer devices are valued. This paper proposes a valveless piezoelectric pump with a combination of rhinoceros horn and V-channel. High output performance is achieved by exploiting the unidirectional flow effect caused by the different coefficients of pressure loss in the forward and reverse directions caused by the convex and concave curved sections of the rhino horn and the V-channel. The theoretical analysis of the energy loss in the cavity and the simulation of the flow field in the cavity confirm the effectiveness of the structure. The theoretical optimum angle combination was further determined by varying the rhinoceros horn out-swing angle and the V-channel angle (10°, 20°, 30°). The experimental data showed that the optimum output flow rate was 86.8 ml/min at 160 V and 40 Hz with channel angle of 20° and swing angle of 10°. This combined valveless piezoelectric pump reduces backflow, improves pump output performance and is expected to be used in biomedical high viscosity precision fluid transfer devices.