Working performance of cleaning units of combine harvesters on slopped fields

Publication Type

Journal contribution

Authors

Böttinger,S.; Fliege,L.

Year of publication

2012

Published in

Landtechnik

Band/Volume

67/1

Page (from - to)

34-36

Keywords

Kornverlust, Mähdrescher, Reinigungsanlage

The performance of a combine harvester is determined by the maximum throughput at acceptable grain losses. At optimum throughput, the cleaning system reacts very sensitive to variations of the inclination, whereby the influence of lateral inclination is much higher than the influence of longitudinal inclination. The influence of inclination up to 15 % on the performance of cleaning units with lateral hillside modulation was analyzed. For this purpose several combines of equal type of construction have been analysed in different crops using large-scale parcel tests. The deployed measurement instrumentation corresponds to the series-production status of the combine harvesters. Various testing conditions and systematic errors make the handling of the collected data very complex. However, it enables the evaluation of the measurement characteristics of different sensors at variable inclination. The results display a possible triplication of cleaning losses in different throughput ranges between 15 and 55 t/h already at a lateral inclination of 10 %. The influence of longitudinal inclination is marginal.