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Piezoelectric stack pump

A piezoelectric stacking and stacking technology, which is applied in the direction of pumps, piezoelectric devices/electrostrictive devices, pumps with flexible working elements, etc., can solve the problem that the output displacement is easily affected by the load, the output force of the piezoelectric sheet is small, Low output accuracy and other issues, to achieve the effect of simple structure, increased frequency and output pressure, and simple process

Inactive Publication Date: 2008-07-09
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a piezoelectric stack pump to solve the problems of small piezoelectric sheet output force, output displacement easily affected by load, low output precision, and relatively weak carrying capacity in piezoelectric sheet piezoelectric pumps.

Method used

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  • Piezoelectric stack pump

Examples

Experimental program
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Effect test

Embodiment Construction

[0008] The stack support body 3 is fixedly connected with the support 6, a set of butterfly springs 7 is sleeved on the piston, the fixed nut 1 4 and the fixed nut 2 5 are threadedly connected with the piston, and the piezoelectric stack 2 is placed on the fixed nut 1 4 , the pre-tightening screw 1 is fixedly connected to the rear of the stacked support body 3, the lower cover 12 is fixedly connected to the valve seat 13, the metal sealing diaphragm 9 and the support, the piston 8 is fixedly bonded to the metal sealing diaphragm, and the water inlet is single The directional valve 11 is fixedly connected with the valve seat, the water outlet check valve 10 is fixedly connected with the valve seat, the metal sealing diaphragm and the valve seat form a working chamber 15, a buffer chamber 14 is formed between the lower cover and the valve seat, and there is a water inlet on the lower cover 16 is connected with the water outlet 17 and the buffer chamber respectively, and the taper...

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Abstract

The invention relates to a piezoelectric stack pump, which belongs to a piezoelectric driver. A stack support body is permanently connected with a supporting block. A group of belleville springs are sheathed on a plunger. Two fixing nuts are connected with the plunger though thread. Piezoelectric stacks are arranged on the fixing nuts. A lower cover permanently connects a valve base and a metallic seal diaphragm with the supporting block. The plunger is permanently bonded with the metallic seal diaphragm. An intake one-way valve is permanently connected with the valve base. A water outlet one-way valve is permanently connected with the valve base. The metallic seal diaphragm and the valve base form a working chamber. A cushion chamber is formed between the lower cover and the valve base. The lower cover is provided with an intake and a water outlet, and is connected with the cushion chamber. The cone angles of the intake and the water outlet are 30 degrees to 40 degrees. The invention is a novel piezoelectric stack pump with simple structure, large flow, high output pressure, simple process, stable performance and high precision.

Description

technical field [0001] The invention belongs to the field of micro-electronic machinery, in particular to a piezoelectric driver. Background technique [0002] Piezoelectric actuators have been developed for nearly a hundred years, and they are widely used in various force, displacement, acceleration, vibration, shock sensors and corresponding actuators. A fluid pump designed and manufactured based on the principle of piezoelectric drive is called a piezoelectric pump. Piezoelectric pumps are an important branch of piezoelectric actuators. This type of pump has a wide range of applications, including applications in medical, chemical analysis, aerospace, and automotive engine fuel supply. Most of the common piezoelectric pumps are piezoelectric disc type. The advantages of this type of pump are simple structure and low manufacturing cost. Because the output force of the piezoelectric disc is small and the output displacement is easily affected by the load, the output of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B43/04H01L41/08H10N30/00
Inventor 刘建芳刘勇刘晓论杨志刚
Owner JILIN UNIV
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