Office studies of the effect of ultrasonic exposure on the process of tuber crop cleansing

Abstract

Abstract The article notes the importance of the final operation for the production of tubers. Attention is focused on the fact that negative impacts on the soil are associated with crushing and removal of the fertile soil layer occur in the process of extracting root crops by digging and separating working bodies of harvesting machines. It is proposed to use ultrasonic action on root crops for cleaning them from soil impurities. The data on the effect of acoustic cavitation, generated by ultrasonic waves with a frequency of 18-18.5 kHz at a power density of at least 1 W / cm2, are given on the effect of acoustic cavitation on a root crop in a laminar flow of liquid. It is noted that multiple hydraulic cumulative shocks that occur when cavitation bubbles collapse should separate soil impurities from root crops, which will significantly reduce time and energy costs. The data of studies of ultrasonic action on tubers are given: the maximum completeness of cleaning root crops is 89% and is provided at a frequency of ultrasound oscillations f1 = 47.8 … 49.8 kHz, vibration intensity S = 41.7 … 43.4 W / cm2 and exposure time t = 20.8 … 28.1 s.