Radial Sandwich Type Spherical Piezoelectric Ceramic Composite Ultrasonic Transducer and Transducer Method

Abstract

The invention belongs to the technical field of transducers, and relates to a radial sandwich type spherical piezoelectric ceramic composite ultrasonic transducer and an energy conversion method, comprising an inner spherical shell, a piezoelectric ceramic spherical shell and an outer ball wrapped sequentially from inside to outside shell; the geometric dimension of the transducer is T=(R 3 -R 2 ) / (R 4 -R 2 ); geometric dimension 0﹤T﹤1; the inner radius R1 of the inner spherical shell is 15-60mm; the thickness of the inner spherical shell, the thickness of the piezoelectric ceramic spherical shell and the thickness of the outer spherical shell are all 4-6mm; the outer spherical shell It includes two hemispherical shells; and the two hemispherical shells are connected through a fixing ring or a thread. The invention can increase the radial prestress of the transducer and improve the power capacity of the transducer; it can realize uniform radiation of sound waves in all directions in three-dimensional space, and the range of action of sound waves of the transducer is expanded to increase the radiation of the transducer The range of sound waves.

Description

Technical field[0001]The present invention belongs to the technical field of transducers, and it is related to a radially sandwich spherical piezoelectric ceramic composite ultrasonic transducer and a transducer method.Background technique[0002]In the field of ultrasound and water, the longitudinal vibration sandwich piezoelectric ceramic ultrasound transducer (also known as a thousand transducer) has obtained a wide range of applications because such transducers are simple and electromechanical conversion efficiency. High and easy to optimize design. However, as power ultrasound techniques are widely used in chemical reactions, wastewater treatment, oil and gas field development, Chinese herbal extraction, food industry, and metal smelting and other fields, higher requirements for ultrasonic power and ultrasound spatial scope, The traditional sandwich longitudinal vibration transducer puts forward more demanding requirements and has exposed some problems that need to be overcome.[0...

AI Technical Summary

Problems solved by technology

[0003] To sum up, in order to meet the requirements of power and ultrasonic range in high-power ultrasonic processing technology, the traditional longitudinal vibration sandwich piezoelectric ceramic ultrasonic transducer has the following deficiencies: First, the sandwich longitudinal vibration ultrasonic transducer The design theory requires that the transverse dimension of the transducer should not exceed a quarter of the wavelength of the acoustic wave radiated by the transducer. Therefore, the acoustic radiation area of ​​this type of transducer is limited by its own theory and cannot exceed a certain limit, thus greatly limiting Second, the sandwich-type longitudinal vibration ultrasonic transducer can only realize the radiation of ultrasonic energy in a single degree of freedom direction, that is, the radiated energy of the transducer is basically along the direction of the transducer. The direction of the longitudinal axis cannot realize two-dimensional or three-dimensional space radiation of ultrasonic energy, which also limits the spatial range of ultrasonic energy.

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