| 摘要 |
<p>A pneumatic grain conveyor comprising--on a mobile frame, and in connection between a grain-feed conduit and a grain-discharge conduit--a drum-like housing having an axial power-driven tube rotatably journaled therein, one end of the tube extending beyond one end of the housing and being coupled, in turnable relation, to the grain-feed conduit, the opposite end of the tube terminating adjacent the other end of the housing, an axial venturi neck on said other end of the housing coupling the latter to the grain-discharge conduit, said terminal end of the tube projecting into the venturi neck in spaced relation thereto, a housing-enclosed fan mounted on the tube intermediate its ends, and a perforate air passage section in the tube between the fan and said one end of the housing; all whereby to produce a suction air flow in the grain-feed conduit and tube, and a pressure air flow in the grain-discharge conduit; the grain flowing through said tube being size-precluded from passage through said perforate section.</p> |
