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High-efficiency piezoelectric ultrasonic transducer and its end cover

An ultrasonic transducer, piezoelectric effect technology, applied in the direction of fluid using vibration, etc., can solve the problem of uneven sound pressure distribution on the radiation surface, and achieve the effects of improving output energy efficiency, reducing temperature rise, and increasing amplitude

Active Publication Date: 2019-02-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the bending vibration of the disc makes the particle vibration on the radiating surface have a phase difference, resulting in uneven sound pressure distribution on the radiating surface

Method used

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  • High-efficiency piezoelectric ultrasonic transducer and its end cover
  • High-efficiency piezoelectric ultrasonic transducer and its end cover
  • High-efficiency piezoelectric ultrasonic transducer and its end cover

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Embodiment Construction

[0030] The accompanying drawings disclose, without limitation, the structural schematic diagrams of the preferred embodiments involved in the present invention; the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] In order to improve the energy efficiency of the ultrasonic transducer, the present invention starts from optimizing the mass distribution of the cylindrical end cap of the ultrasonic transducer. In general, it is to reduce the mass load on the output end face of the cylindrical end cap. The end cover of the transducer has the following structure: the end cover has a cylindrical structure as a whole, but is divided into three parts, such as figure 1 , Figure 2-1 , 2-2 As shown, they are: the front part of the end cover 1-2, the middle part of the end cover 1-3 and the tail part of the end cover 1-4; wherein: the front part of the end cover 1-2 has an output end surface 1-1 for driv...

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Abstract

The invention discloses a high-energy-efficiency piezoelectric ultrasonic transducer and an end cover thereof. The whole end cover is arranged to be of a cylinder structure and comprises an end cover front, an end cover middle and an end cover tail which are arranged coaxially. The end cover front is provided with an output end face. The end cover tail is provided with a fixing part. The end cover middle is of a combined hollow structure and comprises a cross-section transition section. The cross-section transition section is in a circular truncated cone shape or a right trapezoidal platform shape. A large end with the large area and a small end with the small area serve as the two ends of the cross-section transition section. The large end of the cross-section transition section is connected with the end cover tail. The small end of the cross-section transition section is connected with the end cover front. The outer wall of the cross-section transition section is supported on the end cover front by means of a plurality of rib plates uniformly distributed in the peripheral direction. Thus, by reasonably designing mass distribution of the end cover of the transducer, the mass load of the output end face is reduced, in comparison with a traditional solid end cover, by means of the overall arrangement, under the same input power, the amplitude of the output end face can be increased, and the output efficiency is improved beneficially.

Description

technical field [0001] The invention relates to an end cover of a piezoelectric ultrasonic transducer, in particular to an end cover which can increase the amplitude of the sound pressure radiation surface but basically keep the configuration of the sound pressure radiation surface unchanged, and is suitable for applications requiring a sound pressure radiation surface occasion. [0002] The invention also relates to a piezoelectric ultrasonic transducer with the above-mentioned end cap. Background technique [0003] The piezoelectric ultrasonic transducer is a device that uses the inverse piezoelectric effect of piezoelectric ceramics to excite ultrasonic vibrations, and relies on the radiation surface of the metal end cap to output ultrasonic energy. The sandwich piezoelectric ultrasonic transducer (also known as Langevin transducer) is a typical structure of piezoelectric actuators. Based on its configuration design, ultrasonic motors, ultrasonic cutters and ultrasonic w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B06B1/06
CPCB06B1/06
Inventor 芦小龙胡俊辉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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