Studies on the Conditions of Scattered Soil by the Rotary Tines (I)

On the Flying Conditions of Sand by a Straight Tine

Abstract

The author made the experimental equipment with a tine attached to the horizontal shaft (axis), its mechanism is as in the rotary type tillage machine, and expeimented with sand. When the shaft is rotated by a' motor, the sand is thrown by the tine towards the rear. By means of camera, taking pictures from the side of shaft, the authar studied on the flying condtions of the sand and made to figure (Fig 2) on it. For purposes of theoretical investigations, the differential equation of motion (1) of the sand was led from the anguler velocty, cientrifugal force, gravitational acceleration and frictional force, by means of its solutions, the author knew the first velocity, the direction of flying of the sand on the tine, and drew theheoretical trajectory curve. (Fig 6) The results of thetheoretical solutions was about the same as those fo experiments as recognized in this study.