Experimental determination of shaking sieve parameters of chives harvesting machine

Abstract

This study aims to determine the main working parameters of the shaking sieve in the chives harvesting machine. A shaking sieve system was set up; the sandy soil with three different moisture contents (10, 15, and 20%) was prepared; the shaking sieve was controlled at the frequency of 120, 150, and 180 times/min. The inclined angle of the sieve surface was 5 and 10°. Two springs with stiffness of 10.02 and 16.81 N/mm were used to change the sieve structure. As a result, the soil separation efficiency of the sieve was the highest when soil moisture, spring stiffness, inclined angle, and shaking frequency were 10%, 16.81 N/mm, 10°, and 150 times/min, respectively. The travel speed of chives and soil on the sieve surface met the standard requirement at 2.5–2.8 km/h. This result is the essential reference for the design of chives harvesting machines on sandy soil.