Piezoelectric pump of bionic structure

Abstract

The invention provides a piezoelectric pump of a bionic structure. The piezoelectric pump comprises a piezoelectric pump body, a bionic scale plate and a piezoelectric vibrator. The piezoelectric pumpbody comprises an inlet pipe, an outlet pipe, a pump cavity concave table and a piezoelectric pump cavity, the piezoelectric vibrator is arranged on the pump cavity concave table, the bionic scale plate is mounted in the piezoelectric pump body, and multiple layers of bionic scales are arranged on the bionic scale plate. According to simulating of fish swimming and scale changes during acceleration and deceleration, the bionic scale plate is designed, the bionic scale plate can replace a valve structure in the piezoelectric valve pump, and the defects that the valve pump is complex in structure and cannot be replaced are overcome. The large flow of the valve pump is kept, the advantages that the valveless piezoelectric pump is simple in structure and easy to machine are achieved, when thepiezoelectric pump carries out fluid transmission, many vortexes are formed in a pump cavity, and fluid mixing is achieved.

Description

technical field [0001] The invention belongs to the research field of piezoelectric-driven fluid machinery, and in particular relates to a piezoelectric pump with a bionic structure. Background technique [0002] The piezoelectric pump is based on the inverse piezoelectric effect of piezoelectric ceramics, which produces deformation of the piezoelectric vibrator, which causes the volume of the pump chamber to change, and realizes the transportation of liquid. Piezoelectric pumps have the advantages of simple structure, no noise, no electromagnetic interference, etc., and have been widely used in aerospace, biomedical, microelectronics and other fields. [0003] Piezoelectric pumps can be divided into valve pumps and valveless pumps according to whether they contain valves inside. Valved pumps control the movement of the fluid through internal active valves, so the flow rate is higher. However, the long-term movement of the valve is easy to cause fatigue loss and is not eas...

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Problems solved by technology

However, the long-term movement of the valve is easy to cause fatigue loss and is not easy to replace, which increases the application cost of the piezoelectric pump. At the same time, the piezoelectric pump has a small structure size, and the pump chamber contains valves, which makes the structure of the piezoelectric pump more complicated; and the valveless piezoelectric pump Most of the pumps use flow tubes with different flow resistance instead of valves. The structure is simple, but the flow rate is small, the back pressure is low, and the output performance of valveless piezoelectric pumps is poor.

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