Some Consideration on the Hulling Function of Centrifugal Rice Huller and the Hulled Property of Paddy

Abstract

In this paper author practised measurements on the hulling function of Centrifugal Rice Huller, giving one paddy at a time under various revolutions of the impeller.
1. The lower limit of revolution of the impeller for hulling action is about 500-1000 r. p. m., and the upper limit about 4000 r. p. m.
2. S-figured curves in fig. 1 and 3 show the relation between revolution of impeller and hulling rate of paddy.
3. Fig. 2 and 4 indicate the characteristics curves of the hulling property of paddy to given revolution of impeller.
4. Broken rice is assumed to be chiefly occured by the second impact-process.