Effects of Threshing Unit Feature on Threshing Unit Losses for Thai Axial Flow Rice Combine Harvesters

摘要

The objective of this research was to investigate the effects of threshing unit features on threshing unit losses for Thai axial flow rice combine harvesters. Chainat 1 variety is the most susceptible to the losses by the threshing units. The results indicated that the concave rod clearance (RC) was the most effect on threshing unit loss, at 27.54 %, followed by the side concave clearance (SC), concave clearance (CC), and upper concave clearance (UC), at 25.86, 20.29, and 15.27 %, respectively. The number of spike teeth (NT), rotor diameter (RD), and height of spike teeth (HT) showed relatively low losses by the threshing units, at 9.14, 1.90, and 0.22 %, respectively. The increase of RC, SC, UC, RD, NT, and HT reduced threshing unit losses, whereas the increase of CC increased the loss.