Design improvement of a combine harvester threshing unit using automatic balancers

Abstract

The paper presents a design improvement of a combine harvester threshing unit intended for corn grain harvesting. The proposed solution supplements the conventional threshing drum with automatic balancing devices installed at both sides of the drum. Freely moving balancing bodies change their angular position under centrifugal forces and compensate for variable mass imbalance during operation. The modernization is aimed at reducing drum vibration, dynamic loading of the shaft and bearings, and improving the uniformity of threshing without changing the basic technological principle of the combine harvester.