Axial ultrasonic transducer

Abstract

The invention discloses an axial ultrasonic transducer. The axial ultrasonic transducer comprises an adjusting screw 1, a pressurizing body 2, a sealing sliding column 3, an encapsulating oil 4, a center rod 5, an upper cover plate 6, an axial piezoelectric ceramic ring 7, an insulating sleeve 8, a copper electrode plate 9, a lower cover plate 10, a joint ring flange 11 and a vibration isolation ring 12; the pressurizing body and the joint ring flange are fixedly connected together through bolts; an inner cavity structure used for containing the encapsulating oil is formed in the pressurizingbody, and a thin-wall structure is adopted at the bottom of the inner cavity structure of the pressurizing body; the adjusting screw, the sealing sliding column, the pressurizing body and the encapsulating oil provide pre-tightening force required by the axial piezoelectric ceramic ring; the vibration isolation ring is inlaid at the upper end of the upper cover plate; the upper cover plate, the copper electrode plate, the axial piezoelectric ceramic ring and the lower cover plate are assembled together through the center rod; and the copper electrode plate is connected with an ultrasonic powersupply, and the axial ultrasonic-frequency electric energy is converted into axial supersonic-frequency mechanical energy during operation. When different copper electrode plates are connected with the ultrasonic power supply, axial ultrasonic waves with different frequency bands and different energy conversion efficiencies can be obtained.

Description

technical field [0001] The invention belongs to the field of transducers, in particular to an axial ultrasonic transducer. Background technique [0002] Ultrasonic transducer is an energy conversion device that converts alternating electrical signals into acoustic signals or converts acoustic signals in the external sound field into electrical signals within the ultrasonic frequency range. It is a key device in ultrasonic technology. Its performance is good or bad. It is directly related to the effect and scope of application of ultrasonic technology. Due to the wide range of applications of ultrasonic technology and the emergence of new ultrasonic technologies, there are many types of ultrasonic transducers corresponding to this. According to its working principle, it can be divided into piezoelectric ultrasonic transducer, magnetostrictive ultrasonic transducer, electromagnetic ultrasonic transducer and so on. It mainly uses piezoelectric effect, electric strain effect, ...

AI Technical Summary

Problems solved by technology

[0004] The axial ultrasonic transducer is a commonly used ultrasonic transducer. In its common structure, the pre-tightening bolt is mainly used to provide the pre-tightening force, which is limited by the structure of the pre-tightening bolt itself, resulting in the pre-tightening force applied to the piezoelectric ceramic. Uneven force exists, resulting in unstable performance of piezoelectric ceramics, easy to crack and fail, etc.

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