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Large-amplitude sandwich-type piezoelectric ultrasonic compound transducer

A piezoelectric ultrasonic, sandwich-type technology, applied in the direction of the fluid using vibration, can solve the problem of limiting the ultrasonic range of the ultrasonic transducer, and achieve the effect of increasing the ultrasonic radiation area and increasing the ultrasonic radiation power.

Inactive Publication Date: 2014-09-03
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in practical applications, in order to improve the displacement amplitude and ultrasonic radiation intensity of the sandwich piezoelectric ultrasonic composite transducer, the horn only has a small area to radiate ultrasonic waves, which will greatly limit the ultrasonic range of the ultrasonic transducer.

Method used

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  • Large-amplitude sandwich-type piezoelectric ultrasonic compound transducer
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  • Large-amplitude sandwich-type piezoelectric ultrasonic compound transducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 Shown is a schematic diagram of the first embodiment of the present invention. In this embodiment, the radial dimension of the output end of the variable-section metal tubular concentrator 2 is designed to be larger than the radial dimension of its input end, and its purpose is to connect the output end of the variable-section tubular concentrator with a smaller radial dimension. The large metal disc 3 serves as the sound radiation surface, thereby effectively increasing the ultrasonic radiation area of ​​the sandwich piezoelectric transducer 1, and improving the impedance matching between the transducer and the load liquid, so that the ultrasonic energy is transmitted by the ultrasonic The transducer transmits to the load more effectively, which improves the ultrasonic radiation efficiency of the transducer; at the same time, the longitudinal displacement amplitude of the sandwich piezoelectric transducer 1 is adjusted by the variable cross-section met...

Embodiment 2

[0028] Such as figure 2 Shown is a schematic diagram of the second embodiment of the present invention. In this embodiment, the radial dimension of the output end of the variable-section metal tubular concentrator 2 is equal to the radial dimension of its input end, the radial dimension of the outer surface of the variable-section metal tubular concentrator 2 is constant, and the inner surface Conical changes. The structure compared to figure 1 Although the transducer shown does not increase the ultrasonic radiation area of ​​the sandwich piezoelectric transducer 1, it can also improve the impedance matching between the transducer and the load liquid, effectively improving the sandwich piezoelectric ultrasonic transducer of the present invention. Displacement amplitude and ultrasonic radiation intensity of a composite transducer.

Embodiment 3

[0030] Such as image 3 Shown is a schematic diagram of the third embodiment of the present invention. In this embodiment, the radial size of the output end of the variable-section metal tubular concentrator 2 is smaller than the radial size of the input end, although this structural design is relatively figure 1 with figure 2 The transducer shown has a smaller ultrasonic radiation area, but the variable-section metal tubular concentrator 2 of the transducer with this structure has a larger area factor and amplification factor, so the transducer has a larger displacement amplitude and ultrasonic radiation intensity.

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Abstract

The invention relates to a piezoelectric ultrasonic compound transducer which can generate large displacement amplitude in the longitudinal direction and is particularly applicable to the technical field of liquid high-strength ultrasonic processing such as ultrasonic disintegration, ultrasonic emulsification and ultrasonic degradation. In order to achieve the effects, the large-amplitude sandwich-type piezoelectric ultrasonic compound transducer comprises a longitudinal vibration sandwich-type piezoelectric ultrasonic transducer body, a longitudinal vibration variable cross-section metal tube amplitude transformer and a bending vibration metal disk. By the adoption of the technical scheme, compared with a traditional piezoelectric ultrasonic transducer, the large-amplitude sandwich-type piezoelectric ultrasonic compound transducer has larger displacement amplitude and higher ultrasonic radiation intensity, impedance matching between the transducer and loaded liquid is improved, ultrasonic energy can be more effectively transmitted to a load through the ultrasonic transducer, and the ultrasonic radiation efficiency is improved.

Description

technical field [0001] The invention relates to a piezoelectric ultrasonic transducer, in particular to a sandwich type piezoelectric ultrasonic composite transducer capable of producing large displacement amplitude in the longitudinal direction. Background technique [0002] High-power ultrasound has broad application prospects in the field of ultrasonic liquid treatment, such as ultrasonic cleaning, ultrasonic herbal medicine extraction, ultrasonic emulsification, ultrasonic sewage treatment, biodiesel extraction, and sonochemistry. The guarantee for the realization of all these technologies requires that the ultrasonic transducer has high power, high efficiency, high shift amplitude and stable reliability. At present, the sandwich piezoelectric transducer has been widely used in various ultrasonic technology fields due to its advantages of large power capacity and simple structure. However, in high-intensity ultrasonic applications, since the displacement amplitude of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B06B1/06
Inventor 许龙
Owner CHINA JILIANG UNIV
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