Valveless piezoelectric pump

A valveless piezoelectric pump and piezoelectric vibrator technology, applied in the field of fluid machinery, can solve the problems of unfavorable miniaturization of piezoelectric pump and increase of structural size of piezoelectric pump, etc.

Inactive Publication Date: 2005-12-21
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conical flow tube protruding out of the pump chamber undoubtedly increases the structural size of the piezoelectric pump, which is not conducive to the further miniaturization of the piezoelectric pump, especially in the miniaturization and high-density integration of micro-electromechanical systems.

Method used

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Examples

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Embodiment Construction

[0020] The structure of the present invention is shown in Figure 6, the piezoelectric vibrator is 30mm; the working power supply is 220V, 50Hz alternating current; the α of the piezoelectric vibrator 1 =90°, α 2 =30°, when the number of corrugations n=4, water is used as the working medium for the experiment, and the left and right flow channels of the pump produce a water column with a maximum pressure difference of 6mm.

[0021] The conduit 9 is fixed on the upper cover 10 with a commercially available sealant, the sealing cover 7 and the upper cover 10 are fixed with screws 8, and the corrugated chamber bottom 5 and the pump body 6 are assembled in an interference fit before the upper cover 10 is installed. Together, the upper cover 10 and the pump cavity 6 are fastened together with screws 11 . The piezoelectric vibrator 2 is a commercially available non-standard part, the bolt 10 is a standard part, and the parts used in other pumps are all processed from plexiglass or m...

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Abstract

A piezoelectric vibrator is fixedly connected to the pump body, due opposite to the vibrator is the corrugated cavity-bottom. Two intersecting planes angled with the bottom in different angle form a corrugation unit in asymmetric corrugated shape.

Description

technical field [0001] The invention belongs to the field of fluid machinery and relates to a valveless piezoelectric pump at the bottom of a corrugated cavity. Background technique [0002] Piezoelectric pumps belonging to the volumetric type can be divided into valved and valveless piezoelectric pumps if they are classified according to the valve body. If the valve is defined as: during the suction and discharge process of the pump, at least for a moment, there is a mechanical device that is not connected between the pump chamber and the suction port or the discharge center, then the so-called "valveless" means: at any time , The pump cavity is connected with the inlet or outlet. At this time, the one-way flow of fluid relies on special mechanical devices. This device utilizes the properties of the fluid, so that the pump chamber is always in communication with the suction and discharge ports, and can drive the fluid to flow in one direction. At present, most valveless ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B43/04
Inventor 张建辉
Owner BEIJING UNIV OF TECH
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