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Standing wave driven piezoelectric ceramic pump capable of realizing positive and negative directional flow of liquid

A piezoelectric ceramic pump and fluid flow technology, which is applied to pumps with flexible working elements, pumps, machines/engines, etc., can solve the problems of complex structure, traveling wave fluctuation of the pump body, etc., achieve good results, reduce mechanical wear, Safe and reliable results at work

Inactive Publication Date: 2008-05-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the pump body is added to the pump, the structure of the pump becomes complicated. In addition, the pump body produces traveling wave fluctuations, which requires the pump body to be annular

Method used

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  • Standing wave driven piezoelectric ceramic pump capable of realizing positive and negative directional flow of liquid
  • Standing wave driven piezoelectric ceramic pump capable of realizing positive and negative directional flow of liquid
  • Standing wave driven piezoelectric ceramic pump capable of realizing positive and negative directional flow of liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment one: the present invention has designed the embodiment one of the standing wave driven piezoelectric pump, such as figure 1 shown. In this embodiment, the standing wave driven piezoelectric pump consists of the inlet 111 (or 112 ) and the outlet 112 (or 111 ), the pump covers 121 and 122 , and the pump shells 131 and 132 bonded to each other. It is characterized in that two pairs of grooves are opened inside the pump casings 131 and 132, and the upper and lower piezoelectric vibrators 14 are embedded in them. The inlet and outlet are respectively fixed on the upper sides of the pump cover 121 and the pump cover 122 with glue. The pump cover 121 and the pump cover 122 are connected to the pump shells 131 and 132 with epoxy glue or AB glue. The pump cover, pump casing and inlet and outlet are all made of low-density lightweight materials such as fiberglass, nylon, or engineering plastics.

[0055] The piezoelectric vibrator 14 is formed by bonding the piezoe...

Embodiment 2

[0056] Embodiment two: the present invention has designed the embodiment two of the standing wave driven piezoelectric pump, such as image 3 shown. In this embodiment, the standing wave driven piezoelectric pump consists of the inlet port 211 (or 212 ) and the outlet port 212 (or 211 ), the pump covers 221 and 222 , and the pump casings 231 and 232 bonded to each other. It is characterized in that two pairs of grooves are opened inside the pump casings 231 and 241, and the upper and lower piezoelectric vibrators 24 are embedded in them. The inlet and outlet are respectively fixed on the upper sides of the pump cover 221 and the pump cover 222 with glue. The pump cover 221 and the pump cover 222 are connected to the pump shells 232 and 232 with epoxy glue or AB glue. The pump cover, pump casing and inlet and outlet are all made of low-density lightweight materials such as fiberglass, nylon, or engineering plastics.

[0057] The piezoelectric vibrator 24 is formed by bonding...

Embodiment 3

[0058] Embodiment three: the present invention has designed the embodiment three of the standing wave driven piezoelectric pump, such as Figure 7 shown. In this embodiment, the piezoelectric pump driven by standing waves is composed of an inlet port 311 (or 312 ) and an outlet port 312 (or 311 ), pump covers 321 and 322 , and pump shells 331 and 332 bonded to each other. It is characterized in that three pairs of grooves are opened inside the pump casings 331 and 332, and the upper, middle and lower piezoelectric vibrators are respectively embedded in them. The inlet and outlet are respectively fixed on the pump cover 332 with glue. There is a boss in the middle of the pump cover 332, which is used to seal the pump cavity. The pump cover 321 and the pump cover 322 are connected to the pump shells 331 and 332 with epoxy glue or AB glue. The pump casing, pump body and inlet and outlet ports are all made of low-density lightweight materials such as fiberglass, nylon, or engin...

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Abstract

A piezoelectric ceramic pump of stationary wave driving mode enabling to flow fluid in forward and backward directions is prepared as enclosing pump cavity by two parallel pump shells, two pump covers and piezoelectric vibrator, forming piezoelectric vibrator by sticking piezoelectric ceramics on metal plate, setting equally divided electrode regions uniformly on front surface of piezoelectric ceramic plate, generating stationary wave ultrasonic vibration by said vibrator under action of electric field, setting polarization direction of each said region along thickness direction of said plate and making polarization direction be alternatively revered.

Description

1. Technical field [0001] The invention belongs to the technical field of fluid pumps in precision machinery, and in particular relates to the specific structural design, manufacturing method and driving method of a novel piezoelectric ceramic pump driven by standing waves. 2. Technical background [0002] In the background technology, a traditional piezoelectric ceramic pump is composed of a shell surface, an annular cavity, an inlet port and an outlet port, wherein the shell surface is composed of a laminated plate of piezoelectric ceramics and metal elastic body. Under the action of the electric field, the vibration of the shell surface causes the volume of the cavity to change, so that the water inlet and the water outlet have liquid flow. In order to make the liquid flow in one direction, a basic idea is to add a one-way valve at the outlet of the pump, so as to realize the one-way flow of the liquid. Most of the existing piezoelectric pumps adopt this structure. In o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B43/04
Inventor 姚志远赵淳生杨东
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS