FRACTIONAL PNEUMATIC SEPARATOR Russian patent published in 2018 - IPC B07B4/00 

FIELD: agriculture.

SUBSTANCE: invention relates to devices for cleaning grain and seeds of various agricultural crops by means of an air flow and can be used in agriculture and elevator industry. Fractional pneumatic separator includes a pneumatic separating channel, equipped in the lower part with a support grid, input and output devices of the material, in the upper part - by a tap and a solid partition divided into two parts, a separation chamber communicating with the outlet of the pneumatic separation channel and provided with a partition with a rotatable flap mounted on its upper edge and devices for discharging the fractions of the precipitated material, a sedimentation chamber with a light impurity release device, a diametric fan with a regulator of air flow, inertial louvered-countercurrent dust collector, installed in the upper part of the sedimentation chamber and having a common adjacent wall with a separation chamber. Also the entrance window and the initial section of the dust collector are connected with the separation chamber, and its air outlet chamber - with the inlet window of a diametric fan. Also the support grid is located under the first part of the pneumatic separating channel. Also suction window of the second part of the pneumatic separating channel is communicated with the atmosphere and is located below the plane of the support grid. Also the outer wall of the channel at the interface with the end of the support grid is provided with an air supply pipe, and at the upper edge of the continuous partition of the pneumatic separating channel, an adjusting flap is installed.

EFFECT: technical result is a decrease in the specific energy consumption and an increase in the efficiency of seed cleaning.

1 cl, 1 dwg