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Piezoelectric pump based on secondary resonance

A secondary resonance and piezoelectric pump technology, which is applied in the field of piezoelectric ceramic pumps, can solve the problems of high-frequency drive and large single pumping volume, and the incompatibility of high-frequency and low-frequency characteristics of piezoelectric elements, etc., to achieve large pumping volume , the effect of reducing requirements

Active Publication Date: 2015-11-25
SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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Problems solved by technology

[0006] Another purpose of the present invention is to propose a new type of piezoelectric ceramic pump based on the principle of second resonance, which will use frequency conversion to solve the incompatibility between the high-frequency characteristics of the piezoelectric element and the low-frequency characteristics of the valve in the valved piezoelectric positive displacement pump. It has the characteristics of high-frequency drive and large single pumping volume

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  • Piezoelectric pump based on secondary resonance
  • Piezoelectric pump based on secondary resonance
  • Piezoelectric pump based on secondary resonance

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Embodiment Construction

[0033] The present invention will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement it with reference to the text of the description.

[0034] It should be understood that terms such as "having", "including" and "including" used herein do not equate the presence or addition of one or more other elements or combinations thereof.

[0035] Such as figure 1 As shown, a piezoelectric ceramic pump based on secondary resonance includes a first vibrating body 1, a second vibrating body 2, a pump cavity 3 and a base 4.

[0036] The vibrating tube 24 is connected to the piezoelectric element 28 near the outer wall of the bottom end to form the first vibrating body 1. The pump cavity 3 includes a membrane 18, a pump cavity plate 16, a valve plate 14, a one-way valve 15 and an inlet and outlet plate 12. The bottom end of the first vibrating body is clamped by the base 30 and the other end is sleeved with the second v...

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Abstract

The invention discloses a piezoelectric pump based on secondary resonance. The piezoelectric pump comprises a first vibrating body, a second vibrating body, a pump cavity and a base, wherein the outer wall of the bottom end of a vibrating pipe is connected with a piezoelectric element to form the first vibrating body; the pump cavity consists of a film, a pump cavity plate, a valve plate, a one-way valve and an inlet and outlet flow orifice plate; the bottom end of the first vibrating body is fixed by the base, and the other end thereof is sleeved and connected with the second vibrating body; the second vibrating body, the film and the pump cavity plate are sequentially connected; the pump cavity plate, the valve plate and the inlet and outlet flow orifice plate are fixedly connected with the base; and an inlet one-way valve part and an outlet one-way valve part are mounted on the valve plate. With the adoption of the technical scheme, the problem that the high frequency characteristic of a piezoelectric sheet and the low frequency characteristic of the one-way valve in the piezoelectric pump are not compatible is solved. In addition, the piezoelectric pump has a recyclable driving structure and a replaceable pump cavity body, so that the cost is reduced, and liquid cross contamination is avoided.

Description

Technical field [0001] The invention belongs to the technical field of fluid pumps in precision machinery, and specifically relates to a piezoelectric ceramic pump. Background technique [0002] The traditional valved piezoelectric ceramic displacement pump (such as Chinese patents CN100392245C, CN102192135B, CN101589233B) uses the periodic bending deformation of the piezoelectric metal laminate structure to change the volume of the pump cavity, which causes the pressure of the pump cavity to change. The directional flow of liquid is realized under the cooperation of opening and closing of the valve. The resonant frequency of the piezoelectric ceramic laminated structure is generally above several hundred hertz to give full play to the performance of piezoelectric ceramic materials. However, the traditional one-way valve has poor dynamic response characteristics and severe hysteresis when working with the piezoelectric laminate structure. As a result, the best operating frequenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B43/04
Inventor 马玉婷陈忠祥吴云良裴智果王策武晓东
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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