LAB APPARATUS TO ANALYSE GRAIN GRINDING AT VARYING AIR BAROMETRIC PRESSURE IN WORKING CHAMBER

FIELD: mechanics, agriculture. ^ SUBSTANCE: lab apparatus designed to analyse grain grinding at varying air barometric pressure in the tight working chamber comprises bed, vertical rotor shaft, working chamber housing arranged to rotate around the rotor shaft constricted by torque limiters, transparent cover closing the tight working chamber housing from above, outlets with covers arranged at the working chamber housing side bottom parts. The proposed lab apparatus incorporates a driving pulley with a working tool fitted at the driving pulley bottom and representing a rectangular plate with edges bent outward and towards opposite sides and faces sharpened at 45 degrees, a device to measure velocity of a layer of air-grain mix arranged inside the working chamber housing at the transparent cover center and representing a DC current generator with its shaft supporting the blades, T-joint arranged in the hole made in the transparent cover outer side, ball valve fitted in the T-joint straight branch pipe, compressor valve fitted in the T-joint side branch pipe, pressure-vacuum gauge fitted symmetric to the T-joint in the transparent cover outer side hole, vacuum pump and a compressor. ^ EFFECT: tightness of working chamber housing, reduced rotor misbalance, reduced grinding time. ^ 2 cl, 1 dwg