PIPELINE FOR GRAVITATIONAL TRANSPORTATION OF GRAIN HEAP Russian patent published in 2006 - IPC B65G11/00 B65G53/52 

FIELD: mechanical engineering, in particular, gravitational transportation of grain heap through round-section pipes on grain cleaning combines.

SUBSTANCE: pipeline has rectilinear and curved portions with guiding member formed as trough set in inclined position before curved portion at distance L therefrom. Said distance is defined on condition that wear be minimal according to empirical equation: where y is wear, mm; l=0.3...08d is length of guiding member, mm; L is distance from guiding member to maximum worn site, mm; b =0.1...0.3d is width of guiding member, mm; α=20...40 deg is angle of inclination of guiding member; d is inner diameter of pipeline, mm.

EFFECT: increased wear resistance of pipeline.

1 dwg, 1 tbl