Abstract
The article shows the theoretical study of percussive interaction of a grain, which is accelerated by the rotor peelers, with a deck. Theoretically, we defined fracture strength of grain structural elements in case of possible directions of grain and grain impact conditions on deck – under the condition of fixed deck, provided its rotation in the direction of rotor rotation, provided its rotation in the direction opposite the rotor rotation. The work and expended kinetic energy, required for such a failure, was found; the concept of grain recovery rate as the ratio of the kinetic energy before it hit the deck and after was given. Efficiency coefficient of the entire system was defined for different embodiments of grain pin on deck. It is proved that the most effective grain peeling will occur when the deck rotate in the opposite direction of the rotor rotation. In this case, the grain is moved, firstly, in air stream, generated by the rotor, as moving closer to the deck surface it moves in the air flow, generated by it, and changes its direction to reverse movement. That flow is easily controlled by changing the speed of the deck, which makes it possible to obtain a straight line (perpendicular to) hit the grain of it. The carried studies reveal more fully the grain interaction with the deck in the work area of rotor peelers.
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