Wear Measurement of the Rice Huller Rubber-Roll and Study on the Centrifugal Expanding Property due to Speed-up of Roll

Abstract

Defacement of a rubber roll of a rice husker is not uniform with different rotating velocities between the rolls. Therefore, we make it a rule to replace one roll with the other after husking 100-150 bales of rice. So the reporters inquired into the frictional wear of rubber roll. We gained the wear curves of the particular shape to each roll. As the cause of this phenomenon, we discovered that rubber latently has the centrifugal expanding character at high speed revolution.
Accordingly the experimental work was done with the deflection sideways and the expansion across the diameter of the rubber rolls. Afterwards our consideration was found out decisively correct. For these experiments we used that precise bench lathe and the automatic adjusting arrangement for clearance of rice husker rolls furnished with the dial gauge and speed regulating mechanism. At the theoretically caluculated analysis of working force of roll surface, we found that the centrifugal expanding force was very little. But defacement of the rolls comes out on account of the indirect condition of expanding deflection with disregard to this force.