Valveless piezoelectric pump

Abstract

The invention relates to the technical field of a piezoelectric pump, and discloses a valveless piezoelectric pump. The valveless piezoelectric pump comprises a pump body, a piezoelectric vibrator anda flow pipe, wherein a chamber is formed in the pump body, and the piezoelectric vibrator is arranged in the chamber to form a pump chamber; the flow pipe is arranged on the pump body, and a flow channel communicating with the pump chamber is formed in the flow pipe; the flow channel is a rotating body cavity formed by using a curve as a bus, and the curve comprises a hyperbolic segment and a circular arc segment which are in the form of smooth transition; the center of the circular arc segment is positioned outside the flow channel, and the curvature of the hyperbolic segment is less than that of the circular arc segment; and the diameter of the flow channel decreases first and then increases. When a fluid flows through the flow channel, the speed can always increase first and then decrease, so that the pressure differential resistance of the fluid is reduced, and the flow speed is increased and the generation of vortex is minimized at the same time. Thus, the internal flow field ofthe valveless piezoelectric pump reaches a critical state, which is compatible with the two performances of large flow and low vortex. In addition, the structural stability of hyperbola is better.

Description

technical field [0001] The invention relates to the technical field of piezoelectric pumps, in particular to a valveless piezoelectric pump. Background technique [0002] Pumps in the traditional sense are generally driven by electromagnetic or electric motors. Due to the limitation of the working principle, it is difficult to miniaturize to meet the needs of micro-mechanical systems. The piezoelectric pump uses a piezoelectric vibrator as a transducer to integrate the driving source part, the transmission part and the pump body into one. Compared with the pump in the traditional sense, this pump has the advantages of miniaturization, no electromagnetic interference, small volume, low energy consumption, and accurate output. Therefore, it is widely used in small mobile devices, CPU and display cards, game console control boards, notebook computers, blade servers, aerospace, biomedical, machinery, household appliances, microchemical mixing, and water cooling of some electron...

AI Technical Summary

Problems solved by technology

Since the generation of vortex is negatively correlated with Reynolds number, and Reynolds number is positively correlated with flow velocity, it is difficult for existing valveless piezoelectric pumps to be compatible with low vortex and high flow performance.

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