Conical elastic valve piezoelectric pump

Abstract

The invention discloses a conical elastic valve piezoelectric pump. The conical elastic valve piezoelectric pump comprises a middle pump body, a lower pump body, an upper cover, a single crystal waferpiezoelectric piece, sealing rings, conical valves, springs, bolts and nuts, wherein a lower pump body inlet and a lower pump body outlet are formed in the lower pump body; the lower pump body inletis matched with a liquid inlet formed in the middle pump body; the lower pump body outlet is matched with a liquid outlet formed in the middle pump body; the springs and the conical valves are assembled and are mounted in a matched part between the liquid inlet of the middle pump body and the lower pump body inlet; the conical valves and the springs are reversely mounted in a matched part betweenthe lower pump body outlet and the liquid outlet of the middle pump body; circular rubber rings are mounted between the middle pump body and the lower pump body; the bolts and the nuts are matched soas to fix the single crystal wafer piezoelectric piece between the upper cover and the middle pump body; then the upper cover, the middle pump body and the lower pump body are assembled to complete assembling of the piezoelectric pump. The conical elastic valve piezoelectric pump has high output flow and has a broad application prospect in the drug delivery field.

Description

technical field [0001] The invention relates to a piezoelectric pump with a conical elastic valve, which belongs to the field of fluid machinery. Background technique [0002] The piezoelectric pump uses the piezoelectric sheet as the driving source, and uses the periodic vibration of the piezoelectric sheet to cause periodic changes in the internal space of the piezoelectric pump. Under the change of the internal and external pressure difference, the continuous output of the liquid is realized. The traditional passive valve pressure Electric pumps include cantilever beam valve piezoelectric pumps and umbrella valve piezoelectric pumps. The valves of these passive valve piezoelectric pumps have the disadvantage of poor cut-off performance, which leads to a significant decrease in the output flow of piezoelectric pumps, making piezoelectric pumps more effective in drug delivery. Difficult to find wide application in the field. Contents of the invention [0003] Aiming at t...

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Problems solved by technology

[0002] The piezoelectric pump uses the piezoelectric sheet as the driving source, and uses the periodic vibration of the piezoelectric sheet to cause periodic changes in the internal space of the piezoelectric pump. Under the change of the internal and external pressure difference, the continuous output of the liquid is realized. The traditional passive valve pressure Electric pumps include cantilever beam valve piezoelectric pumps and umbrella valve piezoelectric pumps. The valves of these passive valve piezoelectric pumps have the disadvantage of poor cut-off performance, which leads to a significant decrease in the output flow of piezoelectric pumps, making piezoelectric pumps more effective in drug delivery. Difficult to be widely used in the field

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