Funnel-shaped valveless piezoelectric pump

Abstract

The invention discloses a funnel-shaped valveless piezoelectric pump. The funnel-shaped valveless piezoelectric pump comprises a pump body and a piezoelectric vibrator; the pump body is provided with a Y-shaped longitudinal section and is a funnel-shaped pump body formed by rotating the Y-shaped longitudinal section around the longitudinal center symmetric axis of the Y-shaped longitudinal section, and a pump cavity penetrating through from the Y-shaped wide opening end to the Y-shaped narrow opening end is formed; the wide opening end of the funnel-shaped pump body is a fluid inlet end and is provided with at least one fluid inlet; the narrow opening end of the funnel-shaped pump body is a fluid outlet end and is provided with a fluid outlet; fluid blocking bodies are arranged along the inner side wall of the pump cavity; and the piezoelectric vibrator is fixedly or detachably installed at the wide opening end of the pump body. According to the funnel-shaped valveless piezoelectric pump, the funnel-shaped pump body is designed, and the fluid blocking bodies are arranged on the side wall of the pump cavity, so that a valveless piezoelectric pump structure of a pipeline valve and fluid blocking body valve composite structure is formed; and in the fluid sucking process, the forward and reverse flow resistance differences of the funnel-shaped pump body are further increased, and the fluid pumping effect can be more remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery and relates to a valveless piezoelectric pump, in particular to a special-shaped valveless piezoelectric pump. Background technique [0002] Piezoelectric pump belongs to micro-mechanical fluid system, which has the characteristics of simple structure, small size, light weight, low energy consumption, no noise, no electromagnetic interference, etc. It is widely used in precision instruments, biochemistry, medical equipment, aerospace, biological genetic engineering, chemical It has been successfully applied in the fields of fuel supply, water cooling technology solutions for electronic devices and micro-electromechanical systems. [0003] Currently, valved piezoelectric pumps and valveless piezoelectric pumps are two types of piezoelectric pumps that have attracted much attention. [0004] Among them, the biggest difference between the valveless piezoelectric pump and the valved piezoelec...

AI Technical Summary

Problems solved by technology

The existing valveless piezoelectric pump structure has the following deficiencies: (1) The valveless piezoelectric pump of the bluff body valve type, the pump body is usually a cylinder, and forms a regular cylindrical pump cavity, and the bluff body is usually set Above, the fluid flows in through the fluid inlet on the side wall of the pump chamber, and flows out through the fluid outlet; in the process of fluid in and out, the flow resistance difference is formed by the bluff body on the pump base, and the effect of pumping flow depends entirely on the shape of the bluff body on the pump base If the design of the bluff body is reasonable, it can form a better effect of pumping fluid in the limited pump chamber space. If the design of the bluff body is unreasonable, the effect of pumping fluid will be greatly reduced; (2) pipeline The valve-type valveless piezoelectric pump relies on the special shape of the pipeline to form a flow resistance difference in the process of pumping fluid, and the design of the special-shaped pipeline structure increases the difficulty of production and processing of the valveless piezoelectric pump

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