JUSTIFICATION OF THE CONSTRUCTIVE PARAMETERS OF THE ULTRASONIC GENERATOR AND ACOUSTIC RESONATOR FOR THE COCOON REELING PROCESS

Abstrak

The paper substantiates the constructive parameters of the ultrasonic generator and acoustic resonator intended for the ultrasonic cocoon reeling process. The resonant thickness of the PZT-4 piezoelectric element and the length and gain of the titanium (Ti-6Al-4V) acoustic resonator (booster) are calculated. The acoustic field of four generators in the water bath is modelled on the basis of the Helmholtz wave equation and the superposition principle. It is shown that a symmetric 2+2 arrangement of the generators produces constructive interference that increases the acoustic intensity at the bath centre by a factor of 16. The justified parameters (resonant frequency 40 kHz, piezoelement thickness 16 mm, resonator length 64 mm, gain factor K = 6.25, total acoustic power 600 W) ensure stable cavitation above the Blake threshold.