Double-stimulus two-dimensional longitudinal coupled oscillation sandwich type piezoelectric ultrasonic transducer

A longitudinal coupling, piezoelectric ultrasonic technology, applied in the direction of the fluid using vibration, can solve the problems of small power capacity, single ultrasonic radiation direction, small sound radiation area, etc., to achieve the effect of high power capacity

Active Publication Date: 2018-02-27
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a double-excited two-dimensional longitudinally coupled vibration sandwich piezoelectric ultrasonic transducer to solve the problem that the power capacity of the traditional single longitudinal vibration sandwich piezoelectric ultrasonic transducer in the prior art is small, and the traditional The longitudinal vibration sandwich piezoelectric ultrasonic transducer has the problem of single ultrasonic radiation direction and small acoustic radiation area, and the dual-excitation two-dimensional longitudinally coupled vibration sandwich piezoelectric ultrasonic transducer provided by the present invention has dual frequency , two-dimensional four-way ultrasonic radiation and other advantages, to a large extent solve the above technical problems

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  • Double-stimulus two-dimensional longitudinal coupled oscillation sandwich type piezoelectric ultrasonic transducer
  • Double-stimulus two-dimensional longitudinal coupled oscillation sandwich type piezoelectric ultrasonic transducer
  • Double-stimulus two-dimensional longitudinal coupled oscillation sandwich type piezoelectric ultrasonic transducer

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Embodiment 1

[0050] figure 1 It is a schematic structural diagram of Embodiment 1 of a dual-excitation two-dimensional longitudinally coupled vibration sandwich piezoelectric ultrasonic transducer of the present invention. The above-mentioned transducer mainly includes a piezoelectric ceramic crystal stack, an external metal block, and a shared center coupling metal block 31. The shared center coupling metal block 31 is provided with a threaded hole 32 for fixing the transducer and a left prestressed bolt. 41. Right prestressed bolt 42, upper connecting bolt 43 and lower connecting bolt 44. The piezoelectric ceramic instalment stack includes two groups, namely the piezoelectric ceramic stack 11 at the left end and the piezoelectric ceramic stack 12 at the right end. The piezoelectric ceramic stack 11 at the left end and the piezoelectric ceramic stack 12 at the right end share a central coupling metal The block 31 is a completely symmetrical structure. The outer left metal block 21, the le...

Embodiment 2

[0052] Figure 4 It is a schematic structural diagram of the second embodiment of the dual excitation two-dimensional longitudinally coupled vibration sandwich piezoelectric ultrasonic transducer of the present invention. In this embodiment, the structure of the transducer provided in the first embodiment is roughly similar. On the basis of the first embodiment, the difference is the outer left metal block 21, the outer right metal block 22, the outer upper metal block 23 and the outer lower metal block. The block 24 is designed as a tapered structure with variable cross-section. Although this structure has a smaller radiation area at the output end compared with the transducer of the first embodiment, it has a larger displacement amplitude and ultrasonic radiation intensity, so it can be used for high-intensity ultrasound. Application occasions.

Embodiment 3

[0054] Figure 5 It is a schematic structural diagram of the third embodiment of the dual-excitation two-dimensional longitudinally coupled vibration sandwich piezoelectric ultrasonic transducer of the present invention. In this embodiment, the structure of the transducer provided in the first embodiment is roughly similar. On the basis of the first embodiment, the difference is that the center of the outer upper metal block 23 and the outer lower metal block 24 is provided with a tapered hole, In addition, the outer upper metal block 23 and the outer lower metal block 24 and the shared center coupling metal block 31 are an integral structure design, thereby avoiding the ultrasonic transmission loss between the connecting surfaces of various parts. In this embodiment, the central holes of the outer upper metal block 23 and the outer lower metal block 24 can also be designed as holes of other shapes, such as exponential shape, catenary shape, etc., but no matter what shape of th...

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Abstract

The invention provides a double-stimulus two-dimensional longitudinal coupled oscillation sandwich type piezoelectric ultrasonic transducer. The double-stimulus two-dimensional longitudinal coupled oscillation sandwich type piezoelectric ultrasonic transducer comprises a piezoelectric ceramic crystal stack, an outer metal block and a share center coupled metal block, wherein the piezoelectric ceramic crystal stack, the outer metal block and the share center coupled metal block are sequentially and coaxially connected, and a cross-shaped structure is formed by the piezoelectric ceramic crystalstack, the outer metal block and the share center coupled metal block in a horizontal direction and a vertical direction together. According to the double-stimulus two-dimensional longitudinal coupledoscillation sandwich type piezoelectric ultrasonic transducer provided by the invention, defects of lower power capacity, unidirectional ultrasonic irradiation and smaller ultrasonic irradiation areaexisting in a longitudinal oscillation sandwich type piezoelectric ultrasonic transducer in the prior art can be solved to a large extent, and meanwhile, the double-stimulus two-dimensional longitudinal coupled oscillation sandwich type piezoelectric ultrasonic transducer has the advantages of double frequency, two-dimensional four-directional ultrasonic irradiation and the like.

Description

Technical field [0001] The invention relates to the technical field of ultrasonic transducers, in particular to a dual-excitation two-dimensional longitudinal coupling vibration sandwich type piezoelectric ultrasonic transducer. Background technique [0002] Power ultrasound is the use of ultrasonic vibration energy to change the structure, state, and function of material tissues or accelerate these changes. Compared with other processing technologies, power ultrasound technology can often greatly increase processing speed and efficiency, improve processing quality, and complete processing tasks that are difficult to complete with general technology. In the application of power ultrasound technology, the ultrasound transducer is the core component of the ultrasound processing equipment, and its performance directly determines the application effect of power ultrasound. At present, in the field of power ultrasound, the longitudinal vibration sandwich piezoelectric ultrasonic tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B06B1/06
CPCB06B1/06
Inventor 许龙
Owner CHINA JILIANG UNIV
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