Experiments on design parameters of stripping header for super rice in cold region

To further improve the operating function and reduce stripping losses of stripping header for harvesting pre-frost super rice in cold region, through analysis on the main parameters and characteristics of structure which influence the working performance of stripping header, a new stripping header, which was changeable for three types of cylinder, was designed based on the 4ZTL-1800 type stripper harvester with air suction for rice and wheat. Single factor and multi-factors orthogonal experiments were carried out, which selected linear velocity of stripping rotor with triangle plate teeth, feeding velocity, inlet opening size and air-flow velocity as experimental factors, and post harvest loss rate of grain (scattering loss, loss of grain in straw and un-threshed loss) were took as judging indexes. The single factor experiments showed that the post harvest loss rate of grain was remarkably influenced by linear velocity of stripping rotor, feeding velocity and air-flow velocity. Furthermore, the orthogonal experiment indicated that the best scheme was the linear velocity of stripping rotor as 23 m/s, feeding speed as 1.1 m/s, inlet air-flow velocity as 14 m/s and inlet opening size as 120 mm, and the post harvest loss rate was lower than 1% under this condition. The stripping header can meet the requirements of stripping harvest for super rice, and provide basis for the design of the stripping header of stripper harvester.