EXPERIMENTAL DEPENDENCE OF CRUSHING OF OIL SEEDS WHILE THROOMING A SUNFLOWER FROM SUBMITTING BASKETS TO A MOLOTILES CHAMBER AND WIDTH OF A POLYURETHANE BEAM WAX
In accordance with the agrotechnical requirements for the harvesting of sunflower, damage to oilseeds by the threshing machine should not exceed 3%. It is known that the designs of threshing and separating systems of both domestic and foreign combines are focused on threshing of cereals. The use of serial steel scourges of the threshing apparatus often leads to an increase in the content of damaged sunflower oilseeds. In accordance with the data of the agribusiness expert analysis center, the share of sunflower acreage in Russia for the period 2007-2017. ranged from 3.26 to 8.47%, which averages 7.07% of the total area sown to grain crops. The article provides a technical solution to reduce damage to oilseeds when thrashing sunflower baskets with a threshing machine of a combine harvester using polyurethane whips and with an increase in the width of the groove between the reefs. The paper presented a method of experimental verification of the proposed scourges with the rationale for the following factors: the width of the groove of the scourge bk, the supply of baskets to the threshing chamber q, the number of revolutions of the threshing drum nB. The results of the experiments are presented as a dependence of the content of damaged oilseeds D on the feed of the baskets q, the width of the groove of the blade from polyurethane bk at a fixed value of the number of revolutions of the threshing drum nB = 200 min - 1. An analysis of the presented experimental dependence is also given. The value of the width of the groove bk = 10 mm and feed q = 8 kg / s, at which minimum oilseed damage is achieved with a threshing D = 0.2%, is established. An analysis of the above dependence is given.