Research of the screw conveyor flexible sectional working body
Authors: Bulgakov V. ,   National University of Life and Environmental Sciences of Ukraine, Trokhaniak О. ,   National University of Life and Environmental Sciences of Ukraine
Published: July 2024

Purpose. Increasing the operational indicators of the screw conveyor by substantiating the optimal parameters of the flexible sectional screw working body. Methods. During the experimental research of the power and torque of a flexible screw conveyor, methods of conducting experiments on modern equipment were used. During the development and processing of the obtained results, the methods of graphic and regression analysis with the help of applied computer programs were used. Results.To increase the operational performance of screw conveyors, a design of a sectional shaft with a radial ball joint connection of the sections has been developed. For conducting research, an experimental setup was developed and manufactured, with the help of which the power and torque on the drive of a flexible screw conveyor were determined. Based on the results of the research, graphical dependences of the change in torque T and power N on the frequency of rotation of the drive shaft of the working body n when the technological pipeline is completely filled with loose agricultural material were constructed. Graphical dependences of the magnitude of the torques on the drive of the helical sectional working body of the radius of curvature Rk of the technological pipeline and the height h of the movement of the grain material are also constructed. The obtained research results make it possible to choose the optimal structural, kinematic and technological parameters of the developed helical sectional working body for transporting loose agricultural materials. Conclusions 1. The method of conducting experimental studies of the torque T and engine power N during the transportation of loose agricultural material by the developed helical sectional working body of the conveyor has been developed. 2. It was established that with an increase in the rotation frequency n of the working body, the torque T decreases, and the power N increases. From the analysis of graphical dependencies, it was established that with an increase in the rotation frequency n of the working body from 200 to 500 rpm, the torque T decreases, and for barley Т is 7.2 %, for wheat Т is 6.1 %, and for peas Т is 5.2 %. It was established that the power N increases with an increase in the frequency of rotation of the working body n. In particular, for barley – ∆N = 45 %, for wheat – ∆N = 37 % and for peas – ∆N = 25 %. 3. It was established that with an increase in the radius of curvature of the technological highway Rk, the torque T decreases, and with an increase in the height of the movement of the material h, the torque T increases. From the analysis of graphical dependencies, it was established that with an increase in the radius of curvature of the technological line Rk from 0.5 to 2.2 m, the torque T decreases, and for barley Т is 18 %, for wheat Т is 20 %, and for peas Т is 12 %. The analysis of graphical dependencies shows that with an increase in the height of the movement of the material h from 0.2 to 1.8 m, the torque T increases, and for barley Т is 37 %, for wheat Т is 34 % and for peas Т is 32 %. Keywords: screw conveyor, hinged ball joint, grain material, torque.