Water-drop-shaped bluff body valveless piezoelectric pump based on wall attachment effect

Abstract

The invention discloses a water-drop-shaped bluff body valveless piezoelectric pump based on a wall attachment effect. The piezoelectric pump comprises a pump cover, a sealing ring, a piezoelectric vibrator, an O-shaped ring, a pump body, hexagonal head bolts and nuts. The pump body is provided with a liquid inlet pipe, a liquid outlet pipe and three flow channels, and is provided with an inlet water-drop-shaped bluff body, an outlet water-drop-shaped bluff body and drainage structures. In the piezoelectric pump, the piezoelectric vibrator applies an electric signal, the piezoelectric vibratorgenerates telescopic deformation, when the piezoelectric vibrator deforms towards the direction of the pump cover, liquid enters from the liquid inlet pipe, and when the piezoelectric vibrator deforms towards the direction of the pump body, the liquid is discharged from the liquid outlet pipe. In order to prevent the backflow phenomenon generated when liquid is sucked into the pump body, the valveless piezoelectric pump is provided with the inlet water-drop-shaped bluff body, the outlet water-drop-shaped bluff body and the drainage structures, so that backflow is reduced, and the flow of thevalveless piezoelectric pump is increased.

Description

technical field [0001] The invention relates to a drop-shaped bluff body valveless piezoelectric pump based on the Coanda effect, which belongs to the field of fluid machinery. Background technique [0002] Applying the inverse piezoelectric effect of the piezoelectric vibrator to the valveless piezoelectric pump can realize the circulation output of the liquid. Due to the advantages of small size and no electromagnetic interference, the valveless piezoelectric pump has attracted people's attention in recent years. However, Valveless piezoelectric pumps also have the disadvantages of serious backflow and low output flow, which makes it difficult for valveless piezoelectric pumps to be widely used in daily life. Contents of the invention [0003] Aiming at the problems existing in the current valveless piezoelectric pump, the present invention proposes a valveless piezoelectric pump capable of alleviating backflow and having high output flow. [0004] The technical scheme ...

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Problems solved by technology

[0002] Applying the inverse piezoelectric effect of the piezoelectric vibrator to the valveless piezoelectric pump can realize the circulation output of the liquid. Due to the advantages of small size and no electromagnetic interference, the valveless piezoelectric pump has attracted people's attention in recent years. However, Valveless piezoelectric pumps also have the disadvantages of serious backflow and low output flow, making it difficult for valveless piezoelectric pumps to be widely used in daily life

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