Study of the inertial separator of the clover thresher with a pneumatic loader

Abstract

The clover thresher with a pneumatic loader, having an inertial louvered counterflow separator, is characterized by a simple design and operation, reliability and durability, convenient arrangement with other elements of the pneumosystem and relatively low hydraulic resistance. The wedge-shaped sedimentation chamber (separator) with a horizontally displaced discharge opening towards the inlet window is equipped with a louvered partition installed at the junction of the inlet and outlet windows. To determine the basic design parameters of the inertial louvered counterflow separator of the clover thresher, the authors experimentally studied the hull of meadow clover with a humidity of 12 to 14% of the following composition: 57.4% of beans with seeds; 16.6% of free seeds; 25.0% of light impurities; 1.0% of heavy impurities. As a result, the main design parameters of the separator have been determined: the length of the louver grille is 210 mm, the pitch, length, angle of installation of the louver plates are 40mm, 50 mm, 30°, respectively, the height of the inlet and outlet windows of the separator is 120 and 280 mm, the height of the outlet windows of the louver and counterflow cleaners is 190 and 80 mm, the depth of the discharge pipe of the sedimentary chamber is 570 mm. The efficiency of the pneumatic loader when feeding 300 kg/h: the amount of released heavy impurities - 100%, light impurities -33.6%, loss of full-fledged seeds to waste - 0.8% hydraulic resistance - 196 Pa. The research results give grounds to recommend this design for application.