Studies on the Distribution of Threshed Materials under the Concave Sieve of a Over-feed System Threshing Machine

Abstract

In this paper authors investigated the distribution of threashed materials under the concave sieve of the over-feed system power threashing machine. The distribution of threashed materials was almost same to that of under-feed system, showing W-fiqure type at one-man operating and U-fiqure at two men operating, however, they appointed some differences between over-feeding and undeder feeding. Authors clarified the factor characterizing the distribution of over-feed system was derived from the formation of higher effect, illustrating the free distribution of the threashed materials of the pedal threashing machine, as a fundamental model of over-feed system.
In addition to that, they mentioned the custom of applying the over-feed system to the treatment of comparatively big bundle, with regard to the effect of the size of bundle on the distribution of grain.