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Piezoelectric ultrasonic transducer

A piezoelectric transducer and piezoelectric ultrasonic technology, which is applied to sound-producing instruments, instruments, fluids utilizing vibration, etc., can solve the problems of low power density, low structural strength, large radial size, etc., and improve the overall structural strength. , the effect of improving power capacity and electromechanical conversion efficiency

Inactive Publication Date: 2008-02-13
ZHEJIANG NORMAL UNIVERSITY
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Problems solved by technology

[0010] The object of the present invention is to provide an ultrasonic transducer with high structural strength, high power density, and the ability to operate in a radial direction of 360 The ° direction produces uniform sound radiation, especially suitable for high-power radial vibration piezoelectric ultrasonic transducers for liquid ultrasonic treatment under normal pressure and high pressure

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  • Piezoelectric ultrasonic transducer

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Embodiment Construction

[0019] The present invention is further described in detail below by way of examples.

[0020] Referring to accompanying drawing 1 and accompanying drawing 2, a kind of piezoelectric ultrasonic transducer comprises piezoelectric ceramic disc 1, prestressed ring-shaped cover plate 2, cylinder body 3, insulating ring pad 4 and end cover 5, wherein, piezoelectric The ceramic disk 1 adopts a circular piezoelectric ceramic disk, and a through hole is arranged in the middle of the piezoelectric ceramic disk 1; the prestressed annular cover plate 2, the cylinder body 3 and the end cover 5 are made of metal materials, and the insulating and vibration-isolating ring pad 4 Made of polyester fiber; the polarization direction of the piezoelectric ceramic disc 1 is the thickness direction, the two end faces of the piezoelectric ceramic disc 1 in the thickness direction are electrode surfaces, and the thickness of the inner edge of the prestressed annular cover plate 2 is the same as that of...

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Abstract

The invention relates to a high-power radial vibration piezoelectric ultrasonic transducer suitable for liquid ultrasonic treatment under normal pressure and high pressure. The purpose of the present invention is to provide a high structural strength, high power density, which can generate uniform sound radiation in the radial direction of 360°, aiming at the defects of low structural strength and low power density of existing ultrasonic transducers, It is a high-power radial vibration piezoelectric ultrasonic transducer especially suitable for liquid ultrasonic treatment under normal pressure and high pressure. The invention comprises a piezoelectric ceramic disc, a prestressed annular cover plate, a cylinder body, an insulating vibration-isolating ring pad and an end cover, wherein a through hole is arranged on the piezoelectric ceramic disc, and the side of the piezoelectric ceramic disc and the prestressed annular cover plate The composite disk piezoelectric transducer is formed by radial compounding. Several composite disk piezoelectric transducer units whose geometric parameters are consistent with the radial resonance frequency are connected in electrical parallel, and are closely fixed on the inner wall of the cylinder at equal intervals. An insulating vibration-isolating ring pad is arranged between two adjacent composite disc piezoelectric transducer units.

Description

technical field [0001] The invention relates to an ultrasonic device, in particular to a high-power radial vibration piezoelectric ultrasonic transducer suitable for liquid ultrasonic treatment under normal pressure and high pressure. Background technique [0002] Ultrasonic treatment of liquids is a method of using ultrasonic transducers to convert the ultrasonic frequency electrical signals generated by the power supply into high-frequency mechanical vibration energy and radiate it into the liquid medium to produce physical effects such as "cavitation, radiation pressure, and acoustic flow" for processing. Environmental protection and energy-saving green non-ODS ultrasonic application technology has attracted more and more attention. The traditional liquid ultrasonic treatment technology is to apply a sound field by pasting a group of array longitudinal vibration transducers on the bottom or around the container. Due to the strong directivity of the sound field radiated by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B06B1/06G10K9/122
Inventor 刘世清姚晔方健文张志良林机
Owner ZHEJIANG NORMAL UNIVERSITY
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