A Large Amplitude Sandwich Type Piezoelectric Ultrasonic Composite 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.
CN104014473BInactive Publication Date: 2016-06-15CHINA JILIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA JILIANG UNIV
Publication Date
2016-06-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a piezoelectric ultrasonic composite transducer capable of producing large displacement amplitude in the longitudinal direction, and is especially suitable for liquid high-intensity ultrasonic treatment technical fields such as ultrasonic pulverization, ultrasonic emulsification, and ultrasonic degradation. In order to achieve the above effect, a large-amplitude sandwich piezoelectric ultrasonic composite transducer of the present invention includes a longitudinal vibration sandwich piezoelectric ultrasonic transducer, a longitudinal vibration variable cross-section metal tubular energy concentrator and a bending vibration metal disc . Due to the adoption of the technical scheme, a large-amplitude sandwich piezoelectric ultrasonic composite transducer of the present invention has larger displacement amplitude and ultrasonic radiation intensity than traditional piezoelectric ultrasonic transducers, and improves the transducer and The impedance matching between the load liquids enables the ultrasonic energy to be transmitted from the ultrasonic transducer to the load more effectively and improves the ultrasonic radiation efficiency of the transducer.
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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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