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Piezo-stack pump capable of driving double-piston in tandem connection

A piezoelectric stack and series drive technology, which is applied to pumps, pumps, machines/engines with flexible working elements, etc., can solve the problems of small output flow of piezoelectric stack pumps, and achieve high electromechanical energy conversion efficiency and improve The effect of high output flow and elongation

Inactive Publication Date: 2013-03-13
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a piezoelectric stack pump driven in series by two pistons to solve the problem of small output flow of the piezoelectric stack pump

Method used

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  • Piezo-stack pump capable of driving double-piston in tandem connection
  • Piezo-stack pump capable of driving double-piston in tandem connection
  • Piezo-stack pump capable of driving double-piston in tandem connection

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Experimental program
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Effect test

Embodiment Construction

[0012] The upper and lower ends of the pump body 7 are respectively fixed with an upper casing 4 and a lower end cover 9 by screws. The pump body 7 is provided with an upper chamber C1 and a lower chamber C2 separated by a partition 71. The upper chamber C1 and the lower chamber The chamber C2 communicates with the piston hole 72 on the partition 71; the elastic diaphragm 6 is crimped between the pump body 7 and the upper casing 4; It is connected with the elastic diaphragm 6 and the top block 5, the upper surface of the top block 5 leans against the inner wall 42 of the upper case 4; the adjusting screw 1 is fixed on the upper case 4, and the upper The piezoelectric stack 3 in the inner cavity 41 of the housing 4 is squeezed on the top block 5; the small end 131 and the large end 132 of the stepped pump chamber piston 13 are respectively placed in the piston hole 72 on the partition 71 and the pump body In the lower chamber C2 of 7, the small end 131 of the pump chamber pisto...

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Abstract

The invention relates to a piezo-stack pump capable of driving double-piston in tandem connection, and belongs to the field of microfluid transmission and control. A pump body is fixed with an upper shell and a lower end cap; an elastic diaphragm is connected between the pump body and the upper shell in a pressing way; a compression cavity piston is connected with the elastic diaphragm and a top block through a screw; the screw is adjusted to squeeze the piezoelectric stack placed in an inner cavity of the upper shell onto the top block through a torsion-proof gasket; a small end of a pump-cavity piston, a check valve placed on the pump-cavity piston, the compression cavity piston and the pump body form the compression cavity; the lower end cap squeezes a large end of the pump-cavity piston onto a separation plate through a balance spring; and the compression cavity and the pump cavity are communicated through the check valve. The piezo-stack pump has the advantages that one piezoelectric stack can drive the two pistons tandemly connected by the fluid compression cavities filled automatically to output fluid, and is not subjected to fluid action when not working, so that the flow of the pump is large, the volume is small, the cost is low, and the electromechanical energy conversion efficiency is high.

Description

technical field [0001] The invention belongs to a micro-miniature piezoelectric pump used in the field of microfluid transmission and control, in particular to a piezoelectric stack pump driven in series by two pistons. Background technique [0002] Using the expansion and contraction deformation of the piezoelectric stack under the action of an electric field, people have proposed piezoelectric stack pumps with various structures, such as Chinese patents 200810050240.7, 200810064461.X, 200910146813.0, 201110173933.7, etc. Compared with traditional mechanical hydraulic pumps, piezoelectric stack pumps have many advantages such as simple structure, small size, no electromagnetic interference, and good flow and pressure controllability. Therefore, they are widely used in medical treatment, chemical analysis, aerospace, automotive engine fuel Supply, micro-electro-hydraulic systems and other aspects have broad application prospects. As we all know, the piezoelectric stack driv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B43/04
Inventor 阚君武李洋王淑云陈一峰刘殿龙程光明
Owner ZHEJIANG NORMAL UNIVERSITY
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