LIMITING THE ANGULAR SPEED OF SEMI-AUTOMATIC GRAIN CLEANING MACHINE
The main drawback of grain-cleaning machines with rectangular grids is limited bandwidth, due to logical contradiction? that is as you pass through the sieve, the amount of material being cleaned on the grid decreases and the width of the sieve remains the same. At the same time, a large part of the sieve works inefficiently, as only part of its surface is covered with cleaned material. To overcome this shortcoming, a high-performance semi-automatic grain-cleaning machine with grids representing, together, an infused truncated cone, making vertical vibrations is proposed. The housing of semi-automatic grain-cleaning machine rotates. To clean grids from grains stuck in the holes without the use of additional devices a sufficient force of impact on the grain should act at the moment of change in the direction of movement in lower position. To clean the lattice from the grains stuck in the holes, there should be sufficient force of impact on the grain at the moment of change in direction of movement in the lower position. Since the inertia force of the grain at the time of changing the direction of movement of the sieve in the lower position is an order of magnitude greater than gravity, at the time of changing the direction of movement of the sieves in the lower position, the grains that are stuck in the holes of the sieves will be removedfrom them. In order to ensure rational separation of grain pile, angular velocity of the body of a semi-automatic grain cleaning machine should be determined. As a result of calculations, the angular velocity of the body of a semi-automatic grain cleaning machine is determined.