Novel ultrasonic rod
An ultrasonic rod, a new type of technology, applied in the direction of the fluid that uses vibration, can solve the problems of small transverse electromechanical coupling coefficient, large inhomogeneity of the radiation sound field, low electromechanical conversion efficiency of the transducer, etc., and achieve low manufacturing process difficulty and enhanced Ultrasonic treatment effect, simple structure effect
Pending Publication Date: 2020-10-09
ZHEJIANG NORMAL UNIVERSITY
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The disadvantage is that the piezoelectric ceramic round tube inside the transducer is radially polarized, its transverse electromechanical coupling coefficient k31 is small, and the electromechanical conversion efficiency of the transducer is low; in addition, the metal round tube shell of the transducer is double-layered structure, filled with oil
This type of cylindrical transducer is driven by a sandwich-type longitudinal piezoelectric transducer and has a large power capacity. However, due to the high velocity of the longitudinal wave, the vibration has obvious standing wave characteristics along the length of the rod, resulting in a relatively large inhomogeneity of the radiation sound field. Big
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[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0045] see Figure 1-2 As shown in the figure, the new ultrasonic rod includes a slotted circular tube 12, an arc-shaped transition section 9, a stepped horn 8, and a front end of the stepped horn 8. Ultrasonic transducer7. Wherein, the ultrasonic transducer 7 includes a longitudinally driven piezoelectric ceramic vibrator assembly 4, a negative electrode lead 3, a positive electrode lead 5, and a transducer front cover 6 and a transducer rear cover respectiv...
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The invention discloses a novel ultrasonic rod. The novel ultrasonic rod comprises an ultrasonic transducer, a stepped amplitude transformer for amplifying the longitudinal amplitude, and a slotted circular pipe used for generating pipe wall bending vibration; and the stepped amplitude transformer and the slotted circular pipe are sequentially arranged at the output end of the ultrasonic transducer. According to the novel ultrasonic rod, the stepped amplitude transformer and the slotted circular tube are additionally arranged on the basis of the transducer, based on the vibration theory, compared with the longitudinal vibration, at the same resonance frequency, the bending vibration of a vibrator with a large aspect ratio usually works in a vibration mode of a higher order, the number of wave crests per unit length is higher, and the amplitude is also larger, so that the size change of a radiator is larger, the acoustic radiation efficiency is higher, and the radiated sound field is more uniform. In the field of liquid medium treatment such as water body treatment, drug extraction and sonochemical reaction, the practicability of the novel ultrasonic rod is higher than that of an existing cylindrical ultrasonic transducer, the structure is simple, and the manufacturing process difficulty is low.
Description
technical field [0001] The invention relates to the technical field of ultrasonic transducer application, in particular to an ultrasonic rod for longitudinal bending vibration mode conversion. Background technique [0002] High-power ultrasonic transducers have broad application prospects in the fields of ultrasonic cleaning, organic wastewater degradation, and drug extraction. As a liquid ultrasonic processing transducer, on the one hand, it requires a large power capacity; on the other hand, it requires as large a volume deformation as possible to improve the sound radiation efficiency; in addition, it also needs to have a radiation sound field that is as uniform as possible to improve the ultrasonic performance. Effect. [0003] In the existing technology, the patent number is ZL 200520075667.4, and the utility model patent named "High Power Ultrasonic Transducer" is realized by inserting multi-stage radially polarized piezoelectric ceramic circular tubes in a long metal...
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IPC IPC(8): B06B1/06B06B3/02
CPCB06B1/06B06B3/02
Inventor 刘世清高晓蕾樊叶萍麻磊磊黄欣陆志刚
Owner ZHEJIANG NORMAL UNIVERSITY