ESTIMATES AND SEPARATION MODES IN A VIBROPNEUMOIDIZED LAYER OF WHEAT SEEDS WITH IMPURITIES OF VARIOUS NATURES
The experiments were conducted in the laboratory of Agricultural Machinery and Equipment Department at the Perm State Agro-Technological University on an experimental sample of a machine for separating seeds in a vibro-pneumatic-liquefied layer on wheat seeds of the 2021 harvest. The average values of the characteristics of seeds and impurities were: humidity - 13.8%, nature - 804 g / dm3, the relative content of the seeds of bunias 100 pcs. / kg in kind 333 g / dm3, oatmeal - 61 pcs/kg in kind 504 g / dm<sup>3</sup>. The purpose of the research is to determine the estimates and separation modes in a vibropneumoidized bed of seeds with impurities of various natures on an improved vibro-pneumatic separator. A two-factor experiment was conducted with an average specific load on the deck of 2.5 kg / s · m<sup>2</sup>, during which the oscillation frequency of the deck with guides was changed within 450-510 min<sup>-1</sup>, with an amplitude of 0.015 m; the longitudinal angle of its installation was varied in the range of 3-70, with a transverse angle of 0 °; the velocity of the inclined air flow, controlled by an anemometer, was maintained within the range of 1.0-1.2 m/s by the flap of the fan inlet window. Estimates of the efficiency of the machine were: the degree of isolation of each weed, the distribution characteristics of the fractions of purified seeds, the loss of full-fledged seeds to waste, the nature of the purified seeds. Numerical values of technological and energy estimates of the work of an experimental vibro-pneumatic separator with an inclined air flow injected under a deck with a longitudinal angle of inclination at a transverse angle equal to zero, when cleaning seeds from difficult-to-separate impurities and separating a fraction with an increased nature are obtained.