| 摘要 |
FIELD: agriculture.SUBSTANCE: straight-through grain combine includes harvester, slant chamber, air blower and beating and separation device equipped with intake up screw fixture, which is designed as coaxially spaced screw drums, for example three, external, middle and internal. The external drum is designed with forming of multi-pass helical surface along the perimeter. The middle drum is mounted from sections with forming of multi-pass helical surface formed by equilateral perforated triangles the amount of which is even number, for example, twelve, connected to each other by two lateral sides. The internal drum is implemented along the perimeter as multi-pass screw perforated surface with screw grooves made as pockets of the curvilinear shape inside a drum, the curvature centers of which are located inside the drum coss-section. The internal drum is formed by three and more perforated strips of the rectangular shape, which are coiled in a longitudinal direction and curved in a transversal direction on cylindrical mandrel with formation of three and more curvilinear perforated surfaces of the convex shape with the curvature centers inside the drum and lappings inside the drum made as screw vanes along the whole length of the internal drum.EFFECT: increase of intensity of cleaning of seeds.28 dwg |
