IMPROVING THE GRAIN CLEANING MACHINE ASPIRATION SYSTEM

Abstract

The technology for post-harvest processing of grain heaps at agro-industrial complex enterprises is described, and the main separation features used in cleaning the main crop grain from impurities are listed. Data on the design and principle of the aspiration system operation of the MUZ-16 air-sieve grain cleaning machine produced by JSC Borisov Plant Metallist are presented. The methodology for conducting experimental studies of the MUZ-16 aspiration system operation in production conditions and on a laboratory model of the final aspiration pneumatic channel is described. The results of experimental studies are presented. It shows that the part of the MUZ-16 aspiration system that provides preliminary aspiration works effectively, using 1145 m3/hour of air to clean the grain mixture, and suction amounts to only 6.01% of the air sucked into this part of the aspiration system. In this case, the part of the system responsible for the final aspiration of the grain mixture is not effective and has significant air leaks. It has been established that the gap between the front wall of the pneumatic channel and the plate for the grain entry into the channel significantly affects the air flows direction in the pneumatic channel of final aspiration; its value of 4 cm allows the channel to operate at a maximum specific productivity of 666 kg/(cm∙h) s minimal air leaks of 7.7% of the air amount entering the channel. Recommendations for improving the design of the MUZ-16 aspiration system are presented.