HIGH-FREQUENCY PIEZOELECTRIC TRANSDUCER FOR ULTRASONIC COAGULATION Russian patent published in 2020 - IPC B06B1/06 

FIELD: physical and chemical processes.

SUBSTANCE: invention can be used for ultrasonic coagulation, namely to designs of ultrasonic piezoelectric transducers for creation of ultrasonic coagulation systems. Essence of the invention consists in the fact that the piezoelectric transducer consists of series-arranged and acoustically interconnected frequency-reducing reflective pads, packages from even number of ring-shaped piezoelectric elements installed on the common summing pad. It is equipped with an additional radiating pad made in the form of a solid cylinder, the diameter and height of which correspond to half the wavelength of ultrasonic vibrations in the material of the emitting pad. Emitting pad along cylindrical surface is acoustically and mechanically connected to inner surface by summing pad made in form of ring, difference of external and internal diameters of which correspond to quarter of wave length in material, thickness of ring varies from size corresponding to length of emitting patch to size corresponding to diameter of piezoelectric elements, annular piezoelectric elements are installed on flat sections made on side surface of summing pad.

EFFECT: technical result is possibility of creating high-frequency piezoelectric transducer able to add power of 12 separate piezored packages.

1 cl, 1 dwg