The study of the influence of extruder with exentric thread of the screw on its productivity

As a result of the experiment on studying of the effect of the screw eccentric and turning speed on the specific productivity of the extruder at 27 % and 30 % moisture of wheat, the regression equations were obtained and the response surface was con-structed. The experiments were carried out on the extruder which was developed and assembled at the Department of Mechanization of Livestock Mechanization and Engineering Graphics at the South Ural State University of Agriculture. The la-boratory extruder has the type-setting working body consisting of five sections allowing investigating various combinations of parameters of the screw. The drive is carried out by 5.5 kW electric motor by means of a belt drive. The supply of material in the extruder was carried out by vibration feeder, and the frequency of rotation is flexibly regulated by the frequency converter. The main feature of the ex-truder is the use of several sections of the screw with eccentric cutting of blades mounted at the an-gle to each other it allows to create additional force of impact on raw materials, thus the speed of plas- ticization and productivity of the extruder increases. The analysis of obtained results allow us to make a conclusion, that in the presence of eccentric to 2 mm and an increase in the turning speed to 192 rpm, with 27 % moisture of wheat, there is an increase in specific extruder productivity by 8 %, but at 30 % moisture and in increase in frequency of rotation up to 252 rpm, there is an increase in the specific productivity by 14 %. Conducted exper-iments show that eccentric thread of the screw of the extruder has a positive effect on the process of extrusion; it allows us to recommend it for small farms in extruded feeds production.